【摘要】 为了研究YIG中生长感生磁各向异性的来源,穆斯堡尔测量扩展到低温。发现在170K以下,K_u为负,即有一自旋再取向。计算表明,0.01%Fe²⁺的单离子各向异性可以说明观察到的K_u（T）,假定Fe²⁺离子优先占据除（1/4 1/4 1/4）和（3/4 3/4 3/4）外的八面体晶位。更多还原

【Abstract】 Quantitative information about tie growth-induced magnetic anisotropy in Y1G was obtained from Mossbauer spectrum in a previous note^[2]. In order to study the origin of this anisotropy, Mossbauer measurements were extended to low temperatures. We discover that below 170 k, Ku is negative, i-e., there is a spin reorientation. Calculations show that single-ion anisotropy of 0.01/Fe²⁺ may account for the observed Ku（T）, if Fe²⁺ ions are assumed to occupy preferentially octahedral sites except （1/4 1/4 1/4） and （3/4 3/4 3/4）更多还原