Muon spin relaxation studies of magnetic ordering in the molecular-based ferrimagnets PPh4MnIIFeIII(C2O4)3 and (n-C4H9)4NFeIIFeIII(C2O4)3

被引：6
|
作者：
Watts, ID
Carling, SG
Day, P
Visser, D
机构：
[1] UCL Royal Inst Great Britain, Davy Faraday Res Lab, London W1X 4BS, England
[2] Rutherford Appleton Lab, ISIS Div, Didcot OX11 0QX, Oxon, England
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2001年 / 13卷 / 10期
关键词：
D O I：
10.1088/0953-8984/13/10/316
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Muon spin relaxation measurements are reported on two molecular-based ferrimagnets, (PPh4MnFeIII)-Fe-II(C2O4)(3) and (n-C4H9)(4)(NFeFeIII)-Fe-II(C2O4)(3), at temperatures from 8 to 100 K and applied fields up to 2.5 T using pulsed (ISIS) and continuous (PSI) muon sources. In zero field, the initial asymmetry in the muon depolarization falls sharply, and the muon relaxation rate diverges, in the vicinity of the transition to long-range order (T-c) measured by bulk susceptibility, The onset of both effects takes place significantly about T-c, indicating low-dimensional short-range fluctuations in these larger materials. No coherent muon precession is observed in either compound, with pulsed or continuous muons.
引用
收藏
页码：2225 / 2233
页数：9
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