arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1701.03472cond-mat.str-elcond-mat.mtrl-sci
收藏

$γ$ $_2$ O $_6$中的非常规磁相分离

Unconventional magnetic phase separation in $γ$-CoV$_2$O$_6$

L. Shen, M. Laver, E. M. Forgan, E. Jellyman, E. Canévet, J. Schefer, Z. He, M. Itoh, E. Blackburn

摘要:

我们研究了具有复杂磁交换网络的非几何阻挫自旋链系统$γ$-CoV $_{2}$ O $_{6}$的磁性.我们在低温下的中子衍射图($T$ $\leqslant$ $T_{\mathrm{N}}$ = 6.6 K)最好用一个模型来描述,在这个模型中,两个磁相以65(1):35(1)的体积比共存,每个相由单个自旋调制组成。该模型比Lenertz $et$ $al$在J. Phys. Chem. C 118,13981(2014)中提出的模型更好地拟合先前的研究和我们的观察,该模型由具有两个自旋调制的一个相组成。通过从$T_{\mathrm{N}}$降低温度,我们模型的少数相在$T^{*}$ = 5.6 K处经历了一个无限-公度的锁定转变。基于这些结果,我们提出相分离是一种替代的方法,在挫折磁铁的简并提升。

英文摘要:

We have explored the magnetism in the non-geometrically frustrated spin-chain system $γ$-CoV$_{2}$O$_{6}$ which possesses a complex magnetic exchange network. Our neutron diffraction patterns at low temperatures ($T$ $\leqslant$ $T_{\mathrm{N}}$ = 6.6 K) are best described by a model in which two magnetic phases coexist in a volume ratio 65(1) : 35(1), with each phase consisting of a single spin modulation. This model fits previous studies and our observations better than the model proposed by Lenertz $et$ $al$ in J. Phys. Chem. C 118, 13981 (2014), which consisted of one phase with two spin modulations. By decreasing the temperature from $T_{\mathrm{N}}$, the minority phase of our model undergoes an incommensurate-commensurate lock-in transition at $T^{*}$ = 5.6 K. Based on these results, we propose that phase separation is an alternative approach for degeneracy-lifting in frustrated magnets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑