Orbital ordering in Pr0.5Sr0.5MnO3: Pr K-edge XAFS study

被引：0

作者：

Priolkar, K.R. ^{[1
]}

Kulkarni, V.D. ^{[1
]}

Sarode, P.R. ^{[1
]}

Kumashiro, R. ^{[2
]}

Emura, S. ^{[3
]}

机构：

[1] Department of Physics, Goa University, Taleigao Plateau, 403 206, Goa

[2] Department of Material Science, Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Sugimoto

[3] Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047

来源：

Physica Scripta T | 2005年 / T115卷

关键词：

Antiferromagnetic materials - Molecular orbitals - Paramagnetic materials - Phase transitions - Thermal effects - X ray absorption fine structure spectroscopy;

D O I：

10.1238/Physica.Topical.115a00442

中图分类号：

学科分类号：

摘要：

Pr K-edge XAFS spectrum as a function of temperature in Pr 0.5Sr0.5MnO3 has been recorded on BL01B1 beam line at Spring-8, in order to study the effect of lattice distortions as the sample passes from a paramagnetic insulator phase at room temperature to ferromagnetic metal phase below 265 K and to an antiferromagnetic insulator phase at low temperatures. It is found that when the ferromagnetic to antiferromagnetic transition takes place, the MnO6 octahedra rotate in the ab-plane and tilt away from the vertical along the c-axis. The tilting of the MnO6 octahedra is responsible for the A-type antiferromagnetic phase. © Physica Scripta 2005.

引用

页码：442 / 444

页数：2

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