部分有序烧绿石Tb(2)Sn(2)O(7)的中子散射研究
Neutron scattering investigations of the partially ordered pyrochlore Tb(2)Sn(2)O(7).
作者信息
Rule K C, Ehlers G, Gardner J S, Qiu Y, Moskvin E, Kiefer K, Gerischer S
机构信息
Helmholtz Zentrum Berlin, 14109 Berlin, Germany.
出版信息
J Phys Condens Matter. 2009 Dec 2;21(48):486005. doi: 10.1088/0953-8984/21/48/486005. Epub 2009 Nov 11.
Neutron scattering measurements have been performed on polycrystalline Tb(2)Sn(2)O(7) at temperatures above and below that of the phase transition, T(N) = 0.87 K, to investigate further the spin dynamics in the magnetically ordered state. In particular, new neutron spin echo results are presented showing a dependence on Q in the dynamics. We show evidence of the coexistence of static ferromagnetism and dynamically fluctuating spins down to 30 mK and we make a comparison of this partially ordered system to the spin liquid Tb(2)Ti(2)O(7).
在高于和低于相变温度(T_N = 0.87)K的情况下，对多晶Tb(2)Sn(2)O(7)进行了中子散射测量，以进一步研究磁有序态中的自旋动力学。特别是，给出了新的中子自旋回波结果，显示出动力学中对(Q)的依赖性。我们展示了静态铁磁性和动态波动自旋共存直至30 mK的证据，并将这个部分有序系统与自旋液体Tb(2)Ti(2)O(7)进行了比较。
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