Abstract

The microwave phenomena that occur in magnetic multilayer (CoFe)/Cu nanostructures, which have a giant magnetoresistance, are studied. The transmission of waves through a nanostructure is used to investigate the microwave giant magnetoresistance effect. The changes in the transmission coefficient at frequencies of 29–38 GHz are found to exceed the relative magnetoresistance, which distinguishes the system under study from the nanostructures studied earlier. Ferromagnetic and spin-wave resonances are used to study the angular dependences of the microwave absorption spectra of a multilayer (CoFe/Cu)_n nanostructure. The following parameters are determined: the critical angle that determines the boundaries of the ranges of excitation of uniform and nonuniform spin modes, the type of boundary conditions describing the pinning of spins on the outer nanostructure surfaces, and the surface anisotropy and exchange interaction constants.

中文翻译：

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（CoFe）/ Cu纳米结构中的微波巨磁阻以及铁磁和自旋波共振

摘要

研究了在具有巨大磁阻的磁性多层（CoFe）/ Cu纳米结构中发生的微波现象。波通过纳米结构的传输用于研究微波巨磁阻效应。发现在29–38 GHz频率下，传输系数的变化超过了相对磁致电阻，这使所研究的系统与之前研究的纳米结构区分开来。铁磁和自旋波共振用于研究多层（CoFe / Cu）_n的微波吸收光谱的角度依赖性纳米结构。确定以下参数：确定均匀和非均匀自旋模式的激发范围边界的临界角，描述自旋钉扎在外部纳米结构表面上的边界条件的类型以及表面各向异性和交换相互作用常数。