MAGNETIC AND CRYSTALLOGRAPHIC PROPERTIES OF NDCO4B, NDCO4AL, NDCO4GA

被引：29

作者：

IDO, H ^{[1
]}

WALLACE, WE ^{[1
]}

SUZUKI, T ^{[1
]}

CHENG, SF ^{[1
]}

SINHA, VK ^{[1
]}

SANKAR, SG ^{[1
]}

机构：

[1] CARNEGIE MELLON UNIV,CARNEGIE MELLON RES INST,PITTSBURGH,PA 15213

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 09期

关键词：

D O I：

10.1063/1.344837

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic and crystallographic properties have been investigated for NdCo4M (M=B, Al, and Ga). The temperature dependencies of lattice parameters have been determined between 80 and 730 K by x-ray diffraction. NdCo4B crystallizes in the CeCo4B-type structure, whereas NdCo4M (M=Al and Ga) exhibits a CaCu5-type structure. Magnetic properties of NdCo4B show a clear difference from those of its Al and Ga counterparts. All these compounds exhibit planar anisotropy in the low-temperature regime, and the spin-reorientation temperature is found to be ∼280 K for NdCo4Al and NdCo4Ga, whereas NdCo 4B is planar up to its Curie temperature. Thermal expansion curves of c axes show an anomalous contraction for NdCo4B and expansion for NdCo4Al and NdCo4Ga only in the temperature region of planar anisotropy.

引用

页码：4635 / 4637

页数：3

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