Magnetic susceptibility of quasi-one-dimensional compound alpha'-NaV2O5 - Possible spin-Peierls compound with high critical temperature of 34 K
Magnetic susceptibility of quasi-one-dimensional compound alpha'-NaV2O5 - Possible spin-Peierls compound with high critical temperature of 34 K
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DOI：
10.1143/jpsj.65.1178
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发表时间：
1996-05-01
影响因子：
1.7
通讯作者：
Ueda, Y
中科院分区：
文献类型：
--
作者：
Isobe, M;Ueda, Y
合成了化学计量比的α ′-NaV_2O_5粉末样品，并在2 ~ 700 K温度范围内测量了样品的磁化率。当J/k（B）= 280 K，g = 2时，在34 K以上，磁化率与S = 1/2反铁磁Heisenberg线性链的磁化率方程有很好的拟合。在34 K以下，磁化率随温度的降低而迅速降低，最后达到1.49 × 10 ~（-4）emu/V ~（4+）-mol的恒定值，这对于自旋单态V ~（4+）-V ~（4+）对是合理的。自旋磁化率在34 K以下的快速降低表明存在自旋-佩尔斯跃迁。α ′-NaV 2 O 5是一种可能的自旋Peierls化合物，具有迄今观察到的最高临界温度。
Stoichiometric powder samples of alpha'-NaV2O5 were synthesized and the magnetic susceptibility was measured in the temperature range from 2 K to 700 K. The magnetic susceptibility has a good fit to the equation for an S = 1/2 antiferromagnetic Heisenberg linear chain with J/k(B) = 280 K and g = 2 above 34 K. Below 34K the magnetic susceptibility rapidly decreases with decreasing temperature to a constant value of 1.49 x 10(-4) emu/V4+-mol which is reasonable for spin-singlet V4+-V4+ pairs. This rapid reduction of the spin susceptibility below 34 K suggests the existence of a spin-Peierls transition. alpha'-NaV2O5 is a possible spin-Peierls compound with the highest critical temperature yet observed.