Specific heat of La(Fe0.873Co0.007Al0.12)13 compound in antiferromagnetic and ferromagnetic states |
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| Authors: | S. M. Podgornykh V. A. Kazantsev V. I. Myakon’kikh E. V. Shcherbakova A. A. Ermakov |
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| Affiliation: | (1) Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Yekaterinburg, 620041, Russia;(2) Ural State University, Yekaterinburg, 620083, Russia |
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| Abstract: | The low-temperature specific heat C p of La(Fe0.873Co0.007Al0.12)13 compound has been measured in two states: (i) antiferromagnetic (AFM) with a Néel temperature of T N = 192 K and (ii) ferromagnetic (FM). The FM order appears at T = 4.2 K in a sample exposed to an external magnetic field with induction B C ≥ 2.5 T and is retained for a long time in a zero field at temperatures up to T*C = 23 K. The coefficient γFM in the low-temperature specific heat C = γT + βT 3 in the FM state differs quite insignificantly from that (γAFM) in the AFM state. Contributions to the low-temperature specific heat, which are related to a change in the elastic and magnetoelastic energy caused by magnetostrictive deformations, are considered. |
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