教師資料查詢 | 類別: 期刊論文 | 教師: 彭維鋒 Pong, Way-faung (瀏覽個人網頁)

標題:Correlations and dynamics of spins in an XY-like spin-glass (N i0.4 Mn0.6)Ti O3 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 (N i0.4 Mn0.6)Ti O3 single-crystal system
作品名稱(其他語言)
著者Solanki, R.S.; Hsieh, S.-H.; Du, C.H.; Deng, G.; Wang, C.W.; Gardner, J.S.; Tonomoto, H.; Kimura, T.; Pong, W.F.
單位
出版者
著錄名稱、卷期、頁數Physical Review B 95(2), pp.024425(7 pages)
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 ~ 9.1 K. The ENS experiments indicated
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 quasi-elastic neutron scattering (QENS) profiles
below TSG. The life-time of dynamic correlations, τ~ ћ/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)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
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