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首页> 外文会议>Annual Conference on Magnetism and Magnetic Materials >Dynamic spin-spin interactions In magnetically concentrated II_(1-x)Mn_xVI semiconductors: A study by high-field electron paramagnetic resonance
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Dynamic spin-spin interactions In magnetically concentrated II_(1-x)Mn_xVI semiconductors: A study by high-field electron paramagnetic resonance

机译：磁力浓缩II_（1-X）MN_XVI半导体中的动态旋转 - 旋转相互作用：高场电子顺磁共振的研究

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High-field electron paramagnetic resonance (EPR) is used to investigate two magnetically concentrated II_(1-x)Mn_xVI alloys, Cd_(1-x)Mn_xSe and Cd_(1-x)Mn_xSe, for x>0.15. Earlier EPR studies carried out between 9.0 and 35 GHz had shown that the EPR linewidths in II_(1-x)Mn_xVI alloys are determined by anisotropic Dzyaloshinskii-Moriya superexchange. However, broadening of the resonance prevented those early EPR studies to be performed at high Mn concentration x and low temperature T, i.e., precisely when II_(1-x)Mn_xVI systems become magnetically most interesting. We circumvent this problem by performing EPR measurements at high magnetic fields, using frequencies between 95 and 380 GHz. In addition to information on resonance broadening, the ability to measure EPR at very high x and low T (i.e., when the magnetic moments are very strongly coupled) revealed significant shifts of the resonance from the EPR position of Mn~(++) ions. We tentatively ascribe these shifts to internal fields produced by the spin sublattice within the II_(1-x)Mn_xVII alloy.
机译：高场电子顺磁共振（EPR）用于研究两个磁性浓缩的II_（1-X）MN_XVI合金，CD_（1-X）MN_XSE和CD_（1-X）MN_XSE，用于X> 0.15。在9.0和35 GHz之间进行的早期EPR研究表明，II_（1-X）MN_XVI合金中的EPR线宽由各向异性Dzyaloshinskii-Moriya超速确定。然而，扩大谐振阻止了那些早期的EPR研究以高Mn浓度X和低温T，即，当II_（1-X）MN_XVI系统变得磁性最有意义时，精确地进行。我们通过在高磁场下执行EPR测量，使用95到380 GHz之间的频率来规避此问题。除了有关共振扩大的信息之外，在非常高的X和低温下测量EPR的能力（即，当磁矩非常强烈耦合时）揭示了来自Mn〜（++）离子的EPR位置的共振的显着变化。我们暂时归属于由II_（1-X）MN_XVII合金内的旋转子分部产生的内部字段。

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