Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Spin Valve-Based Rhombus-Shaped Microobject Implementing Full Wheatstone Bridge

Mikhail Milyaev
* ,
Larisa Naumova
ORCID logo ,
Anastasiya Germizina
,
Tatyana Chernyshova
,
Anastasia Pavlova
ORCID logo ,
Tatiana Krinitsina
,
Vyacheslav Proglyado
ORCID logo ,
Vladimir Ustinov
Version 1 : Received: 4 December 2023 / Approved: 4 December 2023 / Online: 5 December 2023 (04:29:50 CET)

A peer-reviewed article of this Preprint also exists.

Milyaev, M.; Naumova, L.; Germizina, A.; Chernyshova, T.; Pavlova, A.; Krinitsina, T.; Proglyado, V.; Ustinov, V. A Spin Valve-Based Rhombus-Shaped Micro-Object Implementing a Full Wheatstone Bridge. Sensors 2024, 24, 625. Milyaev, M.; Naumova, L.; Germizina, A.; Chernyshova, T.; Pavlova, A.; Krinitsina, T.; Proglyado, V.; Ustinov, V. A Spin Valve-Based Rhombus-Shaped Micro-Object Implementing a Full Wheatstone Bridge. Sensors 2024, 24, 625.

Abstract

Spin valves with a synthetic antiferromagnet were fabricated by magnetron sputtering. It was shown that the fabricated spin valves had perfect microstructure of layers and smooth interfaces, therefore RKKY interaction dominates in coupling of ferromagnetic layers separated by a copper spacer. Rhombus-shaped microobjects were fabricated from a single spin valve film. The thermomagnetic treatment procedure was found, to form unidirectional anisotropy in the microobject so, that the values of the exchange bias fields in the rhombus’ nonparallel sides were opposite in sign. For the synthetic antiferromagnet CoFeNi/Ru/CoFeNi the difference between ferromagnetic layers thicknesses was found, at which the thermomagnetic treatment forms the same exchange bias all over the rhombus’ side. The sensor element was fabricated in which each side of the rhombus was a shoulder of a Wheatstone bridge. After the thermomagnetic treatment procedure each shoulder worked as an active magnetosensitive element, thus the device operated as the full Wheatstone bridge. The sensor output has the shape of a step, high sensitivity to field change and significant magnetic hysteresis. Such characteristics are suitable for switching devices.

Keywords

spin valve; Wheatstone bridge; magnetic anisotropy; shape anisotropy; exchange bias field

Subject

Physical Sciences, Applied Physics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Download PDF

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Get PDF Cite Share 0
Bookmark BibSonomy Mendeley Reddit Delicious
×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.