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

页码：287 / 291

页数：5

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