教師資料查詢 | 類別: 期刊論文 | 教師: 林大欽 LING, DAH-CHIN (瀏覽個人網頁)

標題:Preparation and Magnetic Properties of (La1−xSr1+x)(Mn0.5Co0.5)O4
學年98
學期2
出版(發表)日期2010/07/01
作品名稱Preparation and Magnetic Properties of (La1−xSr1+x)(Mn0.5Co0.5)O4
作品名稱(其他語言)
著者Lin, M. Y.; Wang, Y. F.; Ling, D. C.; Sheu, H. S.; Kao, H.C.I.
單位淡江大學化學學系
出版者New York: Springer New York LLC
著錄名稱、卷期、頁數Journal of Superconductivity and Novel Magnetism 23(5), pp.721-724
摘要A series of single phase (La1−x Sr1+x ) (Mn0.5Co0.5)O4 (0≤x≤0.40) materials with a tetragonal K2NiF4 structure was prepared by a solid state reaction method at 1400 or 1450 °C with a short period of heating time. Powder X-ray diffraction (XRD) and the Rietveld refinement method were employed for the structural analysis. Unit cell a- and c-axes decrease with increasing amount of Sr substitution. A discrepancy between the zero-field-cooled and the field-cooled magnetization is observed in all samples investigated below a characteristic temperature, T *, which likely arises from the canted nature of spins or the random freezing of spins. It appears that T * decreases with increasing amount of Sr substitution, which is possibly due to the enhancement of chemical pressure induced by Sr and a corresponding increases of the valence of Mn and/or Co.
關鍵字(La1−x Sr1+x )(Mn0.5Co0.5)O4;K2NiF4;Unit cell parameters;Paramagnetic;Ferromagnetic
語言英文
ISSN1557-1939; 1557-1947
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Kao, H.C.I.
審稿制度
國別美國
公開徵稿
出版型式紙本
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