Magnetic and thermodynamic properties of the lightly electron-doped manganite compound (Ca,Sr)Mn0.95Sb0.05O3

被引：4

作者：

Fujiwara, Takahiro ^{[1
]}

Matsukawa, Michiaki ^{[1
]}

Aoyagi, Takahiro ^{[1
]}

Kobayashi, Satoru ^{[1
]}

Taniguchi, Haruka ^{[1
]}

Nimori, Shigeki ^{[2
]}

Suryanarayanan, Ramanathan ^{[3
]}

机构：

[1] Iwate Univ, Dept Mat Sci & Engn, Morioka, Iwate 0208551, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Univ Paris 11, UMR8182, CNRS, Lab Phys Chim Etat Solide, F-91405 Orsay, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 378卷

关键词：

Magnetization reversal; Electron doped manganites; Chemical pressure effect; REVERSAL;

D O I：

10.1016/j.jmmm.2014.11.068

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the dc magnetization and on magnetic susceptibility of the lightly electron doped manganite compound (Ca1-x2+Srx2+)Mn0.94+Mn0.053+Sb0.055+O32- (x=0.0, 0.05, 0.10, 0.15, 0.16, 0.17, and 0.2) with a fixed carrier content, to examine the effect of chemical pressure on magnetization reversal of this system. In a weak magnetic-field-cooled measurement, diamagnetic magnetization is observed for x <= 15%, which changes to positive values for x > 15%. We present a magnetic phase diagram as a function of Sr concentration in several magnetic fields. The ac magnetic susceptibility measurement indicates the existence of magnetic frustration for the Sr substituted samples exhibiting diamagnetic behavior. To better understand the thermodynamic properties of this system, we have measured the specific heat as a function of temperature over a field cooling of 100 Oe. Our data show no anomalies associated with the temperature-dependent magnetization reversal, indicating the absence of long-range magnetic ordering. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：451 / 456

页数：6

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