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.
|ジャーナル||Physica Scripta T|
|出版ステータス||Published - 2005|
|イベント||12th X-ray Absorption Fine Structure International Conference, XAFS12 - Malmo, Sweden|
継続期間: 2003 6月 23 → 2003 6月 27
ASJC Scopus subject areas