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arXiv 1104.3880cond-mat.str-elcond-mat.mtrl-sci
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自旋链反铁磁体Ca3Co2O6的慢磁序-序相变

Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6

S. Agrestini, C. L. Fleck, L. C. Chapon, C. Mazzoli, A. Bombardi, M. R. Lees, O. A. Petrenko

摘要:

用粉末中子衍射方法,我们发现了伊辛自旋链化合物Ca_3Co_2 O_6中一种不寻常的磁序-序转变。当温度降低时,传播矢量k=(0.5,-0.5,1)的反铁磁相从k=(0,0,1.01)的高温自旋密度波结构中出现。这种转变发生在几个小时的前所未有的时间尺度上,并且永远不会完成。

英文摘要:

Using powder neutron diffraction we have discovered an unusual magnetic order-order transition in the Ising spin chain compound Ca3Co2O6. On lowering the temperature an antiferromagnetic phase with propagation vector k=(0.5,-0.5,1) emerges from a higher temperature spin density wave structure with k=(0, 0, 1.01). This transition occurs over an unprecedented time-scale of several hours and is never complete.

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。

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