Magnetic properties and magnetocaloric effect in NdCo2B2 compound

被引：33

作者：

Li, Lingwei ^{[1
]}

Nishimura, Katsuhiko ^{[1
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 14期

关键词：

STRUCTURAL CHEMISTRY; TEMPERATURE; MAGNETORESISTANCE; HEAT; LA; GD; SM; ER;

D O I：

10.1088/0022-3727/42/14/145003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic properties and magnetocaloric effect (MCE) of NdCo2B2 were investigated by magnetization and heat capacity measurements. The compound exhibits a paramagnetic to ferromagnetic transition at T-C = 27 K. The effective magnetic moment is 3.53 mu(B)/Nd atom, and the magnetic ground state of Nd ion forms a doublet state in NdCo2B2. A large reversible MCE was observed, which is related to a second-order magnetic transition from the paramagnetic to the ferromagnetic state. The values of maximum magnetic entropy change (-Delta S-M(max)) reach 4.5 and 8.3 J kg(-1) K-1 for field changes of 20 and 70 kOe without obvious hysteresis loss in the vicinity of the Curie temperature, respectively. The corresponding maximum adiabatic temperature changes (Delta T-ad(max)) are evaluated to be 3.3 and 6.9 K.

引用

页数：5

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