Dramatic change in magnetization behaviors of la1.4Sr 1.6Mn2O7+δ by control of excess oxygen

Yuui Yokota, Jun Ichi Shimoyama, Shigeru Horii, Kohji Kishio

研究成果: Article査読

抄録

Effects of excess oxygen on the magnetic properties and crystal structure of La1.4Sr1.6Mn2Oy, single crystals have been systematically investigated. The magnetic easy axis of the crystal annealed at 700°C in flowing oxygen for long time was discovered to change from the c-axis to the ab-plane below ferromagnetic transition temperature (TC) by introduction of excess oxygen. Powder X-ray diffraction (XRD) analyses revealed that the c-axis length decreased and the a-axis length increased with increase of the excess oxygen. These behaviors are similar to that of increasing of strontium substitution level in the L 2-2xSr1-2xMn2O7 [(La,Sr)Mn327] system. TC was increased up to ∼130K by the introduction of excess oxygen, however the transition was broad. These suggested that the excess oxygen can play an important role for determining magnetic properties of the (La,Sr)Mn327.

本文言語English
ページ(範囲)L204-L206
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
45
4-7
DOI
出版ステータスPublished - 2006 2月 3
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(その他)
  • 物理学および天文学(全般)

フィンガープリント

「Dramatic change in magnetization behaviors of la1.4Sr 1.6Mn2O7+δ by control of excess oxygen」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル