Super-Paramagnetic Blocking Phenomena and Room-Temperature Ferromagnetism in Wide Band-Gap Dilute Magnetic Semiconductor (Ga, Mn)N
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概要
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We present computer simulations on the super-paramagnetic blocking phenomena in wide band-gap dilute magnetic semiconductors (DMSs) in particular (Ga, Mn)N. It is shown that due to the formation of magnetic nano-clusters of magnetic impurities under the spinodal decomposition, super-paramagnetic blocking temperature ($T_{\text{B}}$) of the DMS is enhanced and hysteretic magnetic response can be observed at finite temperature even if Curie temperature of the whole system is nearly zero. $T_{\text{B}}$ higher than room temperature can be expected and the blocking phenomena explains reported ferromagnetic behaviour of wide band-gap DMS at high temperature.
- Japan Society of Applied Physicsの論文
- 2007-07-25
著者
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Fukushima Tetsuya
The Institute Of Scientific And Industrial Research (isir) Osaka University
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SATO Kazunori
The Institute of Scientific and Industrial Research (ISIR), Osaka University
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Katayama-yoshida Hiroshi
The Institute Of Scientific And Industrial Research (isir) Osaka University
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