Effect of composition on magnetocaloric properties of Mn$ _{3} $Ga$ _{(1-x)} $Sn$ _{x} $C
| Autor: | Dias, E. T., Priolkar, K. R., Cakir, O., Acet, M., Nigam, A. K. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics 117, 123901 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4916095 |
| Popis: | A study investigating the effect of Sn substitution on the magnetocaloric properties of Mn$ _{3} $Ga$ _{(1-x)} $Sn$ _{x} $C compounds reveals that nature of the MCE has a strong dependence on the nature of the magnetic ordering. For small amounts of Sn ($ x\leq0.2 $) the MCE is of the inverse type wherein an increase in the applied field beyond 5T gives rise to a table like temperature dependence of the entropy due to a coupling between the first order FM - AFM transition and the field induced AFM - FM transition. Replacement of Ga by larger concentrations of Sn ($ x\geq0.71 $) $(\Delta S_M)$ results in a change of the MCE to a conventional type with very little variation in the position of $(\Delta S_M)_{max}$ with increasing magnetic field. This has been explained to be due to the local strain introduced by A site ions (Ga/Sn) which affect the magnetostructural coupling in these compounds. Comment: 7 pages 7 figures, Accepted for publication in J. Appl. Phys |
| Databáze: | arXiv |
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