High isothermal magnetocaloric effect in La(Fe,Si)13 based alloys
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914248120074240 |
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| author | Kamantsev, A. P. Koshkid`ko, Yu. S. Kovalev, O. E. Nyrkov, N. Yu. Golovchan, A. V. Amirov, A. A. Aliev, A. M. |
| author_facet | Kamantsev, A. P. Koshkid`ko, Yu. S. Kovalev, O. E. Nyrkov, N. Yu. Golovchan, A. V. Amirov, A. A. Aliev, A. M. |
| contents | This work investigates the magnetocaloric effect (MCE) in LaFe_{11.6}Si_{1.4} and LaFe_{11.78}Mn_{0.41}Si_{1.32}H_{1.6} alloys under adiabatic ΔT and isothermal ΔQ conditions in a magnetic field of μ_{0}H = 1.8 T. The studied samples exhibited high reproducibility of the ΔQ-effect upon cyclic magnetic field application, which is of critical importance for magnetic cooling systems.The LaFe_{11.78}Mn_{0.41}Si_{1.32}H_{1.6} alloy demonstrate high values of the isothermal MCE, with a maximum ΔQ = 3400 J/kg in a magnetic field of μ0H = 1.8 T near the Curie temperature (TC) of 275 K. This value is 2.5 times higher than the well-known corresponding values for pure Gd at room temperature. Furthermore, the structural and magnetic properties of LaFe13-xSix-based alloys with Cr and Co additions were investigated using density functional theory calcula-tions. It was shown that the addition of Cr leads to a decrease in the equilibrium volume, i.e., to a com-pression of the crystal lattice, whereas Co addition causes its expansion. These changes are expected to increase or decrease the T_{C}, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_07478 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High isothermal magnetocaloric effect in La(Fe,Si)13 based alloys Kamantsev, A. P. Koshkid`ko, Yu. S. Kovalev, O. E. Nyrkov, N. Yu. Golovchan, A. V. Amirov, A. A. Aliev, A. M. Materials Science This work investigates the magnetocaloric effect (MCE) in LaFe_{11.6}Si_{1.4} and LaFe_{11.78}Mn_{0.41}Si_{1.32}H_{1.6} alloys under adiabatic ΔT and isothermal ΔQ conditions in a magnetic field of μ_{0}H = 1.8 T. The studied samples exhibited high reproducibility of the ΔQ-effect upon cyclic magnetic field application, which is of critical importance for magnetic cooling systems.The LaFe_{11.78}Mn_{0.41}Si_{1.32}H_{1.6} alloy demonstrate high values of the isothermal MCE, with a maximum ΔQ = 3400 J/kg in a magnetic field of μ0H = 1.8 T near the Curie temperature (TC) of 275 K. This value is 2.5 times higher than the well-known corresponding values for pure Gd at room temperature. Furthermore, the structural and magnetic properties of LaFe13-xSix-based alloys with Cr and Co additions were investigated using density functional theory calcula-tions. It was shown that the addition of Cr leads to a decrease in the equilibrium volume, i.e., to a com-pression of the crystal lattice, whereas Co addition causes its expansion. These changes are expected to increase or decrease the T_{C}, respectively. |
| title | High isothermal magnetocaloric effect in La(Fe,Si)13 based alloys |
| topic | Materials Science |
| url | https://arxiv.org/abs/2601.07478 |