CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES OF La1.2Sr1.8-xCaxMn2O7

• 来源期刊: 中国物理(英文版)
• 学科: 物理学
• 关键词: structure magnetic property Jahn-Teller distortion
• 年，卷（期）: 2001,（9）
• 所属期刊栏目: CONDENSED MATTER:STRUCTURE,THERMAL AND MECHANICAL
• 页码范围: 853-856
• 页数: 4页
• 分类号: O4
• 语种: 英文

摘要

The effect of divalent cation substitution on the structure and magnetic properties of La1.2Sr1.8-xCaxMn2O7 (x = 0-0.900) is investigated in this paper. Partly replacing divalent cation Sr2+ by Ca2+ ions results in the weakening and then disappearance of long-range ferromagnetic ordering, and the formation of spin canting and low-temperature spin-glass. Based on structural analysis by Rietveld profile fitting, we suggest that this variation of magnetic property be related to a Jahn-Teller-type lattice distortion of MnO6 octahedra due to the introduction of the smaller sized Ca2+ions.