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arXiv 1202.4181cond-mat.mes-hall
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磁弹耦合与自旋电磁机械效应的可能性

Magnetoelastic Coupling and Possibility of Spintronic Electromagnetomechanical Effects

Helen V. Gomonay, Svitlana V. Kondovych, Vadim M. Loktev

摘要:

纳米电磁机械系统(NEMMS)为高速自主纳米谐振器和信号发生器的发展开辟了一条新的道路,这些纳米谐振器和信号发生器可以用作致动器、用于信息处理、作为量子计算机的元件等。那些包括铁磁层的NEMMS由于与自旋转移相关的效应可以由电流控制。在本文中,我们讨论了另一种情况下,当电流控制的行为的纳米棒,包括反铁(而不是一个铁)磁性层。我们认为,在这种情况下,交流自旋极化电流也可以诱导共振耦合磁机械振荡,并产生振荡磁化的反铁磁(AFM)层。这些效应是由施加到AFM的\emph{i})自旋转移力矩和由\emph{ii})自旋极化自由电子由于$sd$ -交换而产生的有效磁场引起的。

英文摘要:

Nanoelectromangetomechanical systems (NEMMS) open up a new path for the development of high speed autonomous nanoresonators and signal generators that could be used as actuators, for information processing, as elements of quantum computers etc. Those NEMMS that include ferromagnetic layers could be controlled by the electric current due to effects related with spin transfer. In the present paper we discuss another situation when the current-controlled behaviour of nanorod that includes an antiferro- (instead of one of ferro-) magnetic layer. We argue that in this case ac spin-polarized current can also induce resonant coupled magneto-mechanical oscillations and produce an oscillating magnetization of antiferromagnetic (AFM) layer. These effects are caused by \emph{i}) spin-transfer torque exerted to AFM at the interface with nonmagnetic spacer and by \emph{ii}) the effective magnetic field produced by the spin-polarized free electrons due to $sd$-exchange.The described nanorod with an AFM layer can find an application in magnetometry and as a current-controlled high-frequency mechanical oscillator.

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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