Magnetic spin glass properties of the bi-layer hydrate Na0.3NiO2.1.3H2O

被引：6
作者：
Park, S.
Kang, K.
Yoon, W. -S.
Moodenbaugh, A. R.
Lewis, L. H.
Vogt, T.
机构：
[1] Univ S Carolina, Dept Chem & Biochem, USC NanoCtr, Columbia, SC 29208 USA
[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA
[3] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
来源：
SOLID STATE COMMUNICATIONS | 2006年 / 139卷 / 02期
关键词：
oxides; spin glass; magnetism;
D O I：
10.1016/j.ssc.2006.04.036
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic properties of the new metal oxide bi-layer hydrate Na0.3NiO2.1.3H(2)O were investigated. DC and AC magnetic susceptibility measurements revealed the compound to be a spin glass at low temperatures with a freezing point of T-f similar to 3.5 K. Using the Vogel-Fulcher relationship an activation energy of E-a/k similar to 71.6 K, a Vogel-Fulcher temperature of T-o similar to 1.9 K and a frequency dependence of the freezing temperature consistent with a frustrated magnetic spin-glass rather than a RKKY spin glass were determined. Ni K-edge X-ray absorption spectroscopy (XAS) show an absorption edge shift toward higher energies in Na0.3NiO2.1.3H(2)O compared to Nao.7NiO2 and suggests that Ni occurs in two possible electronic configurations: a combination of 3d(7) (S=1/2) and 3d(6) (S=0) or 3d(7)L states, with L representing a hole in the oxygen p-states. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：60 / 63
页数：4
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