Orbital fluctuations and orbital order in FeCr2S4

被引：28
作者：
Tsurkan, V [1 ]
Fritsch, V
Hemberger, J
von Nidda, HAK
Büttgen, N
Samusi, D
Körner, S
Scheidt, EW
Horn, S
Tidecks, R
Loidl, A
机构：
[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany
[2] Moldavian Acad Sci, Inst Phys Appl, MD-2028 Kishinev, Moldova
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2005年 / 66卷 / 11期
关键词：
magnetic materials; magnetic properties; specific heat;
D O I：
10.1016/j.jpcs.2005.09.041
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Heat-capacity investigations on the ferrimagnetic spinel FeCr2S4 poly- and single crystals provide experimental evidence of orbital liquid and orbital glass states. The low-temperature transition in the polycrystals at 10 K arises from orbital order and is very sensitive to the sample stoichiometry. In the single crystals the orbital order is fully suppressed resulting in an orbital glass state with the heat capacity following a strict T-2 dependence towards zero temperature. At elevated temperatures, FeCr2S4 exhibits an unexpected large linear term of about 100 mJ mol(-1) K-2 as the fingerprint of the orbital liquid. (c) 2005 Elsevier Ltd. All rights reserved.
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收藏
页码：2036 / 2039
页数：4
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