Weak ferromagnetism in CuB2O4 copper metaborate
Weak ferromagnetism in CuB2O4 copper metaborate
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DOI：
10.1016/s0304-8853(99)00449-7
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发表时间：
1999-10-01
影响因子：
2.7
通讯作者：
Staub, U
中科院分区：
文献类型：
--
作者：
Petrakovskii, G;Velikanov, D;Staub, U
给出了四方CuB 2 O 4单晶的磁化率、磁化强度、比热和μ SR测量结果。CuB_2O_4在21 K以上为顺磁体。由高温磁化率测量确定的顺磁Neel温度和有效磁矩分别等于θ = -9.5 K，μ（eff）= 1.77 μ（B）。在21-10 K温度范围内测定了具有弱自发磁矩的易平面磁结构。在T = 10 K时，弱自发磁矩m（0）= 0.56emu/g。在T-M = 10 K时观察到桑色素的磁性相变。μ SR测量证实了T = 21和10 K时存在两个磁相变。(C)1999 Elsevier Science B. V.保留所有权利。
The results of the magnetic susceptibility, magnetization, specific heat and mu SR measurements of the tetragonal CuB2O4 single crystals are presented. CuB2O4 is a paramagnet at temperatures above 21 K. The paramagnetic Neel temperature and effective magnetic moment determined from high-temperature magnetic susceptibility measurements are equal to theta = -9.5 K, mu(eff) = 1.77 mu(B), respectively. The easy plane magnetic structure with a weak spontaneous magnetic moment was determined in the temperature range 21-10 K. The value of the weak spontaneous magnetic moment is m(0) = 0.56 emu/g at T = 10 K. Morin magnetic phase transition was observed at the temperature T-M = 10 K. The mu SR measurements confirm the existence of two magnetic phase transition at T = 21 and 10 K. (C) 1999 Elsevier Science B.V. All rights reserved.