Specific heat at high temperature and magnetic measurements in Nd0.5Sr0.5MnO3 and R0.5Ca0.5MnO3 (R = Nd, Sm, Dy and Ho) samples

被引：5
|
作者：
López, J [1 ]
de Lima, OF [1 ]
机构：
[1] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 369卷 / 1-2期
关键词：
magnetically ordered materials; calorimetry;
D O I：
10.1016/j.jallcom.2003.09.053
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have made a magnetic and specific heat characterization of five manganese samples. Ferromagnetic, antiferromagnetic and charge ordering transitions in our samples agree with previous reports. Each specific heat curve was successfully fitted at high temperatures by an Einstein model with three optical phonon modes. Close to the charge ordering and ferromagnetic transition temperatures the specific heat curves showed peaks superposed to the characteristic response of the lattice oscillations. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：227 / 230
页数：4
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