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), p.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 en_US
ISSN 2469-9969; 2469-9950
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版,紙本,其他
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/111787 )