Anomalous Spontaneous Reversal in Magnetic Heterostructures
Anomalous Spontaneous Reversal in Magnetic Heterostructures
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DOI：
10.1103/physrevlett.96.137201
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
Z. Li;C. Miller;J. Eisenmenger;I. Roshchin;I. Schuller
中科院分区：
文献类型：
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作者：
Z. Li;C. Miller;J. Eisenmenger;I. Roshchin;I. Schuller
本文提出了FM/AF异质结系统（AF = FeF_2，FM=（Ni，Co））中的一种新现象，即FM开关也可以通过热循环来控制。有人发现，FM饱和以上的AF尼尔温度TN，自发地反转其磁化强度对一个恒定的磁场随着温度的降低。这种反转还表现出显著的磁化强度与温度的滞后，具有可调的高度和宽度的字段。这让人想起传统的磁化滞后，并使人们能够控制的FM开关的热循环，并可能有影响的热辅助磁记录。
This papers present a novel phenomenon in FM/AF heterostructure systems (AF = FeF2, FM= (Ni,Co)), where the FM switching can be also controlled by thermal cycling. It was found that a FM saturated above the AF Neel temperature TN, spontaneously reverses its magnetization against a constant field with decreasing temperature. This reversal also exhibits a significant magnetization vs. temperature hysteresis, with a tunable height and width by the field. This is reminiscent of the conventional magnetization hysteresis and enables one to control the FM switching by thermal cycles, and may have implication on the thermally assisted magnetic recording.