Формирование обменного смещения и анизотропия формы в микрообъектах на основе спиновых клапанов

Физика твердого тела Pub Date : 2023-01-01 DOI:10.21883/ftt.2023.08.56152.76

А.А. Гермизина, Л. И. Наумова, М. А. Миляев, Р. С. Заворницын, А. И. Павлова, И. К. Максимова, В. В. Проглядо, И. Ю. Каменский, Владимир Васильевич Устинов

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Abstract

Rhombus-shaped microobjects formed by strips of two micrometers wide were fabricated from the spin valve film. The influence of the shape anisotropy on the layers magnetic moment rotation during the spin valve magnetic reversal is studied. A method for two-stage thermomagnetic treatment in a direction-fixed magnetic field has been found. The method allows to obtain the opposite sign values of the exchange bias fields in the non-parallel rhombus sides. The direction of the formed exchange bias is determined by the deviation of the strip from the uniaxial anisotropy axis and from the magnetic field applied during thermomagnetic treatment. Based on a rhombus-shaped microobject made from a single spin valve film, the device is a Full Wheatstone bridge. Each side of the rhombus is an active magnetically sensitive element.

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自旋阀型微型物体形状的交换位移和各向异性形成

利用自旋阀薄膜制备了2微米宽的条状菱形微物体。研究了自旋阀磁反转过程中形状各向异性对层磁矩旋转的影响。提出了一种在固定方向磁场中进行两段热磁处理的方法。该方法允许在非平行菱形边上获得交换偏置场的相反符号值。形成的交换偏置的方向由带材与单轴各向异性轴的偏差和热磁处理过程中施加的磁场的偏差决定。该装置基于由单个自旋阀薄膜制成的菱形微物体，是一个完整的惠斯通电桥。菱形的每边都是一个主动磁敏感元件。

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