Specific heat of La1.2Sr1.8Mn2O7

被引：20

作者：

Gordon, JE ^{[1
]}

Bader, SD

Mitchell, JF

Osborn, R

Rosenkranz, S

机构：

[1] Amherst Coll, Dept Phys, Amherst, MA 01002 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.60.6258

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The specific heat of a single crystal of the layered perovskite La1.2Sr1.8Mn2O7 has been measured for 83 <T<290K. A high, narrow peak associated with the ferromagnetic ordering of the Mn3+-Mn4+ ions is observed to have a maximum at T-c =115.57 K, in agreement with magnetization, neutron scattering, and resistivity measurements. A second, hysteretic, peak at 260 K is also observed. An estimate is made of the substantial magnetic entropy removed by cooling the crystal from 290 K to T-c. [S0163-1829(99)1 1533-9].

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页码：6258 / 6261

页数：4

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