Magnetic and crystal structure correlations in PrMn1.5Co0.5Ge2:: a synchrotron diffraction study

被引：3

作者：

Ehrenberg, H

Dincer, I

Elmali, A

Elerman, Y

Fuess, H

机构：

[1] Tech Univ Darmstadt, Inst Sci Mat, D-64287 Darmstadt, Germany

[2] Ankara Univ, Fac Engn, Dept Engn Phys, TR-06100 Ankara, Turkey

来源：

SOLID STATE COMMUNICATIONS | 2002年 / 124卷 / 10-11期

关键词：

alloys; light-arc melting; crystal structure and symmetry; magneto-structural coupling; synchrotron radiation;

D O I：

10.1016/S0038-1098(02)00478-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Structure details of PrMn2-xCoxGe2, x = 0.5, with the tetragonal ThCr2Si2-type structure have been studied by high-resolution synchrotron powder diffraction. Unit cell parameters a and c, unit cell volume V, c/a, (partial derivativea/partial derivativex)(T) and (partial derivativec/partial derivativex)(T) were determined from Rietveld refinements in the temperature range 10-300 K. The average composition <x> = 0.49(4) is determined based on a detailed diffraction profile analysis. Our measurements indicate three anomalies in the c/a ratio, (partial derivativea/partial derivativex)(T) and (partial derivativec/partial derivativex)(T) at a temperature of about 150 K, which is very close to the transition temperature from antiferromagnetic to ferromagnetic intralayer ordering. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：429 / 432

页数：4

共 8 条

[1] Magnetic interactions in PrMn2-xCoxGe2 [J].