Influence of Gd Doping at A Site upon the Magnetic Structure of La0.7-xGdxSr0.3MnO3 Systems

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2003,（4）
• 页码范围: 564-567
• 页数: 4页
• 语种: 英文

摘要

We investigated the magnetism of systems Lao.7-xGdxSro.3MnO3 (x = 0.00, 0.10, 0.15, 0.20, 0.30, 0.40, 0.50,0.60, 0.70) by M-T curves, M-H curves, and electron-spin-resonance (ESR) spectra. The experimental results indicate that the system is in a ferromagnetic long-range order at Iow-doping level; the samples of x = 0.30 and 0.40 show cluster-spin glass behaviour: and the antiferromagnetic characters are observed at x ≥ 0.50. For the samples of x = 0.30 and 0.40, the ESR spectra demonstrate that the phase separation occurs above the Curie temperat ure.