Thermal transitions in nano-patterned XY-magnets
Thermal transitions in nano-patterned XY-magnets
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DOI：
10.1063/1.4891479
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发表时间：
2014-07-28
影响因子：
4
通讯作者：
Hjorvarsson, Bjorgvin
中科院分区：
文献类型：
--
作者：
Arnalds, Unnar B.;Ahlberg, Martina;Hjorvarsson, Bjorgvin
我们制造了超薄的圆盘状岛屿，其中形状的各向异性将力矩限制在岛屿平面上，产生了类似xy的超自旋。在低温下，超自旋被阻挡，随着温度的升高，它们经历一个过渡到超顺磁状态。这种动态超自旋状态的开始与磁岛的直径有关，它持续到一个由磁岛材料的本征有序温度控制的温度，在这个温度范围内，磁岛的动态行为可以得到。(C) 2014 AIP出版有限责任公司
We have fabricated ultra-thin disc shaped islands wherein shape anisotropy confines the moment to the island plane, creating XY-like superspins. At low temperatures, the superspins are blocked, and, as the temperature is increased, they undergo a transition into a superparamagnetic state. The onset of this dynamic superspin state scales with the diameter of the islands, and it persists up to a temperature governed by the intrinsic ordering temperature of the island material defining a range in temperature in which dynamic behavior of the magnetic islands can be obtained. (C) 2014 AIP Publishing LLC.