Mössbauer Study of Magnetic Properties of KFeF 3

A. Ito, S. Morimoto
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引用次数: 7

Abstract

The Mossbauer spectroscopy has been applied to powder and single crystal samples of KFeF 3 between 4.2 K and 300 K. Thin slices of the single crystals with the {111} and {110} plane stressed along the respective plane were used to determine the orientation of the hyperfine field H h f and the principal axes of the EFG tensors ( X , Y , Z ). H h f and Z are parallel to the [111] direction between T N =112 K and ∼65 K. Below ∼65 K a rotation of the principal axes of the EFG tensors takes place. Below T c =41 K ( T c is defined in the text) H h f is still parallel to the [111] direction within 5° but the principal axis Z of the EFG tensors lies in the (1\bar10) plane and makes an angle θ (40° at 4.2 K) to the [111] direction. The magnetization has been also measured for a single crystal between 4.2 K and 300 K. The weak ferromagntic moment parallel to the direction was observed below T c . A spin arrangement below T c has been proposed.
Mössbauer kfef3磁性能的研究
在4.2 K ~ 300 K范围内对kfef3粉末和单晶样品进行了穆斯堡尔光谱分析。在{111}和{110}平面沿各自平面受力的单晶薄片上确定了超精细场H H f的取向和EFG张量的主轴(X, Y, Z)。H H f和Z在T N =112 K和~ 65 K之间平行于[111]方向。在~ 65 K以下,EFG张量的主轴发生旋转。在T c =41 K以下(T c在文中定义)H H f仍平行于[111]方向5°以内,但EFG张量的主轴Z位于(1\bar10)平面,并与[111]方向成一个角θ(在4.2 K时为40°)。在4.2 K和300 K之间测量了单晶的磁化强度。在温度以下观察到平行于方向的弱铁磁矩。提出了一种低于tc的自旋排列。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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