教師資料查詢 | 類別: 期刊論文 | 教師: 杜昭宏 Chao-hung Du (瀏覽個人網頁)

標題:Magnetic ordering and dielectric relaxation in the double perovskite YBaCuFeO5
學年105
學期2
出版(發表)日期2017/03/01
作品名稱Magnetic ordering and dielectric relaxation in the double perovskite YBaCuFeO5
作品名稱(其他語言)
著者Yen-Chung Lai; Chao-Hung Du; Chun-Hao Lai; Yu-Hui Liang; Chin-Wei Wang; Kirrily C Rule; Hung-Cheng Wu; Hung-Duen Yang; Wei-Tin Chen; G J Shu
單位
出版者
著錄名稱、卷期、頁數Journal of Physics: Condensed Matter 29(14), 145801(8 pages)
摘要Using magnetization, dielectric constant, and neutron diffraction measurements on a high quality single crystal of YBaCuFeO5 (YBCFO), we demonstrate that the crystal shows two antiferromagnetic transitions at ${{T}_{N1}}\sim 475$ K and ${{T}_{N2}}\sim 175$ K, and displays a giant dielectric constant with a characteristic of the dielectric relaxation at T N2. It does not show the evidence of the electric polarization for the crystal used for this study. The transition at T N1 corresponds with a paramagnetic to antiferromagnetic transition with a magnetic propagation vector doubling the unit cell along three crystallographic axes. Upon cooling, at T N2, the commensurate spin ordering transforms to a spiral magnetic structure with a propagation vector of ($\frac{h}{2}$ $\frac{k}{2}$ $\frac{l}{2}\pm \delta $ ), where $h$ , $k$ , and $l$ are odd, and the incommensurability δ is temperature dependent. Around the transition boundary at T N2, both commensurate and incommensurate spin ordering coexist.
關鍵字multiferroics;magnetic phase transition;ferroelectric relaxation
語言英文
ISSN1361-648X
期刊性質國外
收錄於SCI;
產學合作國內;國外;
通訊作者Chao-Hung Du
審稿制度
國別英國
公開徵稿
出版型式,電子版
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