教師資料查詢 | 類別: 期刊論文 | 教師: 高惠春 KAO, HUEY-CHUEN (瀏覽個人網頁)

標題:Comparison of the magnetization behaviors in perovskite compounds La 0.7-xLnxPb0.3MnO3 (Ln=Pr and Sm)
學年93
學期1
出版(發表)日期2005/01/30
作品名稱Comparison of the magnetization behaviors in perovskite compounds La 0.7-xLnxPb0.3MnO3 (Ln=Pr and Sm)
作品名稱(其他語言)
著者Young, S. L.; Horng, Lance; Ho, Y. W.; 高惠春; Kao, H. C. I.; Chen, H. Z.
單位淡江大學化學學系
出版者World Scientific Publishing
著錄名稱、卷期、頁數International Journal of Modern Physics B 19(1-3), pp.563-568
摘要The magnetization behaviors of two manganite oxide systems, La0.7-xLnxPb0.3MnO3 (Ln=PrandSm), have been synthesized. The replacement of La ions by Pr or Sm results in a considerable decrease in the ferromagnetic ordering temperature TC and clearly irreversible behavior in the zero-field-cooling-field-cooling curve at a low applied field, showing a short-range spin order phase. These facts are in agreement with the smaller ionic radii of Pr (0.130 nm) and Sm (0.124 nm) ions in contrast to La ion (0.136 nm), and the corresponding larger distortion of perovskite structures. The saturation magnetization MS decreases as Sm content increases relative to the increase of MS as Pr content increases. This can be interpreted in terms of the competition between suppression of ferromagnetism due to structure tuning induced by the small ionic radius of the interpolated cations into the La-site and the increase of ferromagnetically interacting spins due to the introduction of magnetic Pr or Sm ions with f-shell electrons.
關鍵字Magnetization;manganite;perovskite;ferromagnetism
語言英文
ISSN0217-9792
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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