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:Correlations and dynamics of spins in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single crystal system
學年105
學期1
出版(發表)日期2017/01/23
作品名稱Correlations and dynamics of spins in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single crystal system
作品名稱(其他語言)
著者R. S. Solanki; S.-H. Hsieh; C. H. Du; G. Deng; C. W. Wang; J. S. Gardner; H. Tonomoto; T. Kimura; W. F. Pong
單位
出版者
著錄名稱、卷期、頁數PHYSICAL REVIEW B 95(2), pp.024425(7pages)
摘要Elastic and inelastic neutron scattering (ENS and INS) experiments were performed on a single crystal of (Ni0.4Mn0.6)TiO3 (NMTO) to study the spatial correlations and dynamics of spins in the XY-like spin-glass (SG) state. Magnetization measurements reveal signatures of SG behavior in NMTO with a freezing temperature of TSG∼9.1K. The ENS experiments indicate that the intensity of magnetic diffuse scattering starts to increase around 12 K, which is close to TSG. Also, spin-spin correlation lengths (ξ) at 1.5 K are approximately (21±1) and (73±2)Å in the interlayer and the in-plane directions, respectively, demonstrating that magnetic correlations in NMTO exhibit quasi-two-dimensional antiferromagnetic order. In addition, critical exponent (β) is determined to be 0.37±0.02 from the intensity of magnetic diffuse scattering confirms the XY-like SG state of NMTO. INS results show quasielastic neutron scattering (QENS) profiles below TSG. The lifetime of dynamic correlations τ∼ℏ/ΓL, obtained from the half-width at half-maximum of the Lorentzian (ΓL) QENS profiles, are approximately (16±1) and (16±2) ps at 10 K for two positions (0.00, 0.00, 1.52) and (0.01, 0.01, 1.50), respectively. Therefore, our experimental findings demonstrate that short-range-ordered antiferromagnetic clusters with short-lived spin correlations are present in the XY-like SG state of NMTO.
關鍵字
語言英文(美國)
ISSN2469-9950
期刊性質國外
收錄於SCI;
產學合作國外;
通訊作者R. S. Solanki
審稿制度
國別美國
公開徵稿
出版型式,紙本
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