Dynamics of the magnetoelastic phase transition and adiabatic temperature change in Mn1.3Fe0.7P0.5Si0.55

被引：14
|
作者：
Fries, M. [1 ]
Gottschall, T. [2 ]
Scheibel, F. [1 ,3 ,4 ]
Pfeuffer, L. [1 ]
Skokov, K. P. [1 ]
Skourski, I [2 ]
Acet, M. [3 ,4 ]
Farle, M. [3 ,4 ]
Wosnitza, J. [2 ,5 ]
Gutfleisch, O. [1 ]
机构：
[1] Tech Univ Darmstadt, Inst Mat Wissensch, D-64287 Darmstadt, Germany
[2] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD EMFL, D-01328 Dresden, Germany
[3] Univ Duisburg Essen, Fak Phys, D-47057 Duisburg, Germany
[4] Univ Duisburg Essen, CENIDE, D-47057 Duisburg, Germany
[5] Tech Univ Dresden, Inst Festkorper & Mat phys, D-01062 Dresden, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 477卷
基金：
欧洲研究理事会;
关键词：
Magnetic cooling; Dynamical effects; First-order transition; Fe2P; High magnetic-fields; MAGNETOCALORIC MATERIALS; 1ST-ORDER TRANSITION; REFRIGERATION;
D O I：
10.1016/j.jmmm.2018.12.086
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The adiabatic temperature change Delta T-ad of a Mn1.3Fe0.7P0.5Si0.55 Fe2P-type alloy was measured under different magnetic field-sweep rates from 0.93 Ts-1 to 2870 Ts-1. We find a field-sweep-rate independent magnetocaloric effect due to a partial alignment of magnetic moments in the paramagnetic region overlapping with the magnetocaloric effect of the first-order phase transition. Additionally, the first-order phase transition is not completed even in fields up to 20 T leading to a non-saturating behavior of Delta T-ad. Measurements in different pulsed fields reveal that the first-order phase transition cannot follow the fast field changes as previously assumed, resulting in a distinct field-dependent hysteresis in Delta T-ad.
引用
收藏
页码：287 / 291
页数：5
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