A TM-169 MOSSBAUER INVESTIGATION OF TM2CU2O5

被引：6
|
作者：
STEWART, GA [1 ]
CAGODAN, JM [1 ]
机构：
[1] UNIV NEW S WALES,SCH PHYS,KENSINGTON,NSW 2033,AUSTRALIA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 118卷 / 03期
关键词：
D O I：
10.1016/0304-8853(93)90433-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A Tm-169 Mossbauer investigation of Tm2Cu2O5 is reported. All spectra over the temperature range 4.2-300 K are able to be analysed in terms of a single Tm site even though there are known to be 2 non-equivalent Tm sites for the Ho2Cu2O5-type structure. The Tm lattice is determined to be magnetically polarised below T(order) = 17.5 K with a site-independent moment of mu(Tm) = 3.90(8)mu(B) at 4.2 K. A 2-singlet model is proposed wherein the Tm moments are induced by a molecular field which is proportional to the Cu magnetisation. The model is consistent with canted Tm magnetism and estimates a saturation molecular field of 1.65 T to act at each Tm atom.
引用
收藏
页码：322 / 330
页数：9
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