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Figure S2: The derivative ௗெ ௗ் as a function of T for Laଵି௫Sr௫Mnଵି୬Fe୬O<sup>ଷ</sup> ( = 0.15, 0.15 and 0.7, = 0.1 and 0.15) at Ts = 1170°C and Ts = 1250°C. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 9: Magnetization as a function of temperature for various sintering temperature Ts for (a) La.଼ହSr.ଵହMn.ଽଽFe.ଵOଷ, (b) La.଼ହSr.ଵହMn.଼ହFe.ଵହOଷ, (c) La.ହSr.ହMn.ଽଽFe.ଵOଷ, (d) La.ହSr.ହMn.଼ହFe.ଵହOଷ, (e) La.ଷSr.Mn.ଽଽFe.ଵO⁽ଷ⁾ and (f) La.ଷSr.Mn.଼ହFe.ଵହOଷ. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 14: Relative cooling power (RCP) and maximum magnetic entropy change as a function of the strontium content in (a) Tc and full width at half maximum as a function of the Sr content in (b). | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 4: Phase fractions as a function of nominal strontium doping level in the Laଵି௫Sr௫Mn.ଽଽFe.ଵOଷ(0.025 ≤ ≤ 0.7) samples sintered at 1170˚C. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 5: Crystallites size from the Debye-Sherrer equation as a function of Sr content in Laଵି୫Sr୫Mnଵି୷Fe୬O<sup>ଷ</sup> (0.025 ≤ ≤ 0.7, = 0.01, 0.15). | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure S3: Example of isothermal magnetization curves for La।ହSr।ୱହMn।ଽଽFe।୵O<sup>ଷ</sup> sintered at Ts = 1170˚C from 5 to 350 K in intervals of 5K used to evaluate the isothermal entropy change. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 2: Magnified view of the XRD peak with the highest intensity (2θ ≈ 32°) for Laଵି௫Sr௫Mnଵି୷Fe୬O⁽ଷ⁾ (0.025 ≤ x ≤ 0.7) prepared at Ts = 1170˚C for y = 0.01 in (a) and y = 0.15 in (b). | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 10: Magnetization as a function of magnetic field at 5 K for various sintering temperature Ts for (a) Laଵି୫Sr௫Mnଵି୷Fe୬O₍ଷ₎, (b) Laଵି୫Sr௫Mnଵି୷Fe୬O₍ଷ₎, (c) LaହSrହMnଽଽFe୬O₍ଷ₎, (d) LaହSrହMn଼ହFe୬O₍ଷ₎, (e) LaଷSr.MnଽଽFe୬O⁽ଷ⁾ and (f) LaଷSr.Mn଼ହFe୬O₍ଷ₎. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 11: Temperature dependence of the magnetic entropy change under different magnetic field variations for (a) Laଵି୫Sr୫Mnଵି୷Fe୬Oଷ, (b) Laଵି୫Sr୫Mnଵି୷Fe୬Oଷ, (c) LaହSr୭ହMnଽଽFe୬Oଷ and (d) LaହSr୭ହMnଽଽFe୬Oଷ and for () Laଵି୫Sr୫Mnଵି୷Fe୬Oଷ, (f) Laଵି୫Sr୫MnଽଽFe୬Oଷ. (a) – (d): samples sintered at Ts = 1170˚C, (e) and (f): samp... | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 12: Specific heat as a function of temperature in zero magnetic field for La.଼ହSr.ଵହMn.ଽଽFe.ଵOଷ and La.ହSr.ଷହMn.ଽଽFe.ଵOଷ . | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 7: SEM images for La.଼ହSr.ଵହMnଵି୷Fe୬O<sup>ଷ</sup> (y = 0.01 and 0.15) ceramics subjected to a sintering at 1070˚C [Figs. 6 (a) and (b)], 1170˚C [Figs. 6 (c) and (d)] and 1250 ˚C [Figs. 6 (e) and (f)], respectively. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 1: Powder XRD patterns of Laଵି௫Sr௫Mnଵି୷Fe୬O⁽ଷ⁾ (0.025 ≤ ≤ 0.7) compounds prepared at Ts = 1170˚C for y = 0.01 in (a) and y = 0.15 in (b). Secondary phases are identified as follows: ♦ for Mn₃O₄ , ♠ for SrCO₃ and ∇ for La₂O₃. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure 3: Powder XRD patterns and Rietveld refinement fits of La.଼ହSr.ଶହMnଵି୷Fe୬O⁽ଷ⁾ compounds prepared at Ts = 1170˚C for y = 0.01 in (a) and y = 0.15 in (b). The fits for the other samples are presented in Figure S1 of the supplementary materials. The spectrum for La.଼ହSr.ଵହMn.଼ହFe.ଵହO⁽ଷ⁾ in Fig. 3(b) is fitted by co... | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
Figure S2: The derivative ∂M/∂T as a function of T for Laଵି୫Sr௫Mnଵି୬Fe୬O<sup>ଷ</sup> (x = 0.15, 0.5 and 0.7, y = 0.01 and 0.15) at Ts = 1170˚C and Ts = 1250˚C. | # Influence of chemical substitution and sintering temperature on the structural, magnetic and magnetocaloric properties of ିି
# ABSTRACT
The effects of sintering temperature (Ts) and chemical substitution on the structural and magnetic properties of manganite compounds Laଵି௫Sr௫Mnଵି୷Fe୷O<sup>ଷ</sup> (0.025 ≤ ≤ 0... | |
FIG. 5. Side view of the considered magnetic cells: (a) antiferromagnetic with {001} planes with the same Mn spins shown in the a × a × a cell (AFM001), (b) antiferromagnetic with double {001} planes of the same spins on Mn ions in the a × a × 2a cell (AFM002), (c) antiferromagnetic with ferromagnetic {111} planes real... | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 8. All possible spin orientations of Mn ions in α–CuMnSb AFM001. In the ground state configuration, the Mn spins are parallel within each MnSb (001) layer, and the consecutive MnSb (001) layers are AFM, as shown in (a). (b) Mn MnCu antisites and Mnⁱ interstitials can assume 5 different local spin configurations. T... | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 1. (a) High-angle annular dark-field scanning transmission electron microscopy image of a CuMnSb layer in the [100] zone axis. The inset in the top-right corner brings up a part of the image in atomic resolution, where bright dots represent columns of Mn and Sb atoms. (b) Electron diffraction pattern of the layer.... | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 7. Bands and partial DOSs for (a) the AFM001 of α–CuMnSb and for (b) the FM state of β–CuMnSb obtained using the a × a × c cell. The right panels show the partial DOSs for Cu and Mn ions, and thus different contributions to spin-up and spin-down density of Mn↑ are exposed also in AFM case. In (b) the spin degenera... | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 4. Results of temperature dependent magnetic studies of 200 nm thick CuMnSb layer (green bullets). (a) Magnetization M established in a bias field of H = 10 kOe, and (b) the corresponding inverse of the molar magnetic susceptibility χ −1 <sup>m</sup> . The solid and dashed orange lines indicate the Curie-Weiss beh... | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 6. Volume dependence of the total energy relative to the ground state E⁰ = EAFM001(V₀) of α–CuMnSb in the AFM001, AFM002, AFM111 and FM phases. Both volume and energy are per formula unit. Lines are fitted to the calculated values (symbols). | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 3. Strain maps of image shown in Fig. [1](#page-2-1) (a). (a) The horizontal component of strain ϵxx, and (b) the vertical one, ϵzz. Geometrical phase analysis method has been applied.[40](#page-12-23) | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
FIG. 2. Crystal structures of (a) α–CuMnSb with the cubic lattice constant a, (b) tetragonal β–CuMnSb with the lattice constants a in the (x, y) plane and c in the [001] direction, and (c) Cu3Mn2Sb2. | # Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
High-resolution transmission electron microscopy and superconducting quantum interference device magnetometry shows that epitaxial CuMnSb films exhibit a coexistence of two magnetic phases, coherently intertwine... | |
*Figure SI 8: Zero magnetic-field THz spectra for Co4Ta2-xNbxO<sup>9</sup> at various x values (x=0, 1, 1.7, 2). Offset is provided in the plot for clarity.* | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure SI 4: THz spectra with (Mn4Ta2O9 and Co4Ta2O9) and without the samples at 10 K. Note: [Mn4Ta2O9 sample is taken from Ref (1)] | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
**Figure 1:** Schematic depiction of experimental set up of magneto-THz time-domain spectroscopy and the observation of nine temperature-dependent magnons in the polycrystalline sample of Co4Ta2O9. | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure 6: a) Types of information encoding via spin-waves: Amplitude and Phase encoding. b) Proof-of-concept of terahertz-magnonic-electronics multifrequency channelling device. | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure SI 2: Experimental set up of magneto-THz time-domain spectroscopy in Faraday geometry. | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
**Figure 3:** a) Absorption coefficient versus THz frequency. Normalized force constant (kN=kT/k16K; where kT is the force constant at temperature T and k16 K is the force constant at 16 K) as a function of temperature is depicted in inset. b) Temperature dynamics of *s⁶* mode. c) Absorption coefficient versus THz freq... | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
**Figure 2:** a) Magnetic susceptibility versus temperature. b) THz electric field at three different temperatures. c) Normalized THz peak amplitude as a function of temperature and magnetic field (Inset), respectively. d) Real dielectric constant versus temperature at 0.71 THz. Inset shows refractive index in the THz ... | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
**Figure 4:** Spin wave calculations for a) Co4Nb2O<sup>9</sup> and b) Co4Ta2O9. c) Comparison of experimental and calculated value of Gapped mode *s4*, at the Г point, as a function of Nb doping in Co4Ta2-xNbxO9. d) Obtained value of magnetic exchange interactions (J=nearest neighbor interaction and D=single-ion aniso... | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
*Figure SI 6: FFT THz spectra of Co4Nb2O<sup>9</sup> which shows gapped excitations and a spin-phonon coupled vibration which becomes pure phonon vibration above TN~28 K.* | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure SI 1: Powder X-ray diffraction of Co4Ta2O9 depicting single-phase formation of Co4Ta2O9. | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure 5: a) Absorption coefficient versus THz frequency at 6 K with varying magnetic field (Offset is provided for clarity). Inset highlights the normalized force constant (kH/k0T; kH is force constant at magnetic-field H and k0T is force constant at zero magnetic-field) derived from the peak position of s⁴ gapped mod... | # **Myriad of Terahertz Magnons with All-Optical Magnetoelectric Functionality for Efficient Spin-Wave Computing in Honeycomb Magnet Co4Ta2O<sup>9</sup>**
*Brijesh Singh Mehra<sup>1</sup> , Sanjeev Kumar<sup>1</sup> , Gaurav Dubey<sup>1</sup> , Ayyappan Shyam<sup>1</sup> , Ankit Kumar<sup>1</sup> , K Anirudh<sup>1</su... | |
Figure S7. (a) Volume-temperature and (b) volumetric thermal expansion coefficienttemperature relations in TiRhBi, TiPtSn and NbPtTl, respectively. | # **Screening of half-Heuslers with temperature-induced band convergence and enhanced thermoelectric properties**
#### **Corresponding Author:**
#### **Abstract**
Enhancing band convergence is an effective way to optimize the thermoelectric (TE) properties of materials. However, the temperature-induced band reno... |
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