Sound velocity anomaly at around X ≈ 1/8 in La1-xCaxMnO3

被引：17

作者：

Fujishiro, H ^{[1
]}

Fukase, T

Ikebe, M

Kikuchi, T

机构：

[1] Iwate Univ, Fac Engn, Morioka, Iwate 0208551, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1999年 / 68卷 / 05期

关键词：

La1-xCaxMnO3; sound velocity; charge ordering; electrical resistivity; magnetization; ferromagnetic order;

D O I：

10.1143/JPSJ.68.1469

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The sound velocity v(s)(T) of La1-xCaxMnO3 (0.08 less than or equal to X less than or equal to 0.30) has been measured and two types of v(s)(T) anomalies have been observed. One is the v(s)(T) minimum around the ferromagnetic transition temperature T-c, and the other is the v(s)(T) upturn below the characteristic temperature T* which is lower than T-c. T*, as a function of the Ca concentration X, shows a maximum at about X = 1/8 and may be related to the onset of the charge-ordered phase similar to the v(s)(T) anomalies in La1-xSrxMnO3.

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页码：1469 / 1472

页数：4

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