What question did this study set out to answer?

Investigate the origins and variations of Barkhausen noise in micron-sized permalloy magnetoresistive sensors to identify methods for noise suppression.

September 1, 1980IEEE Transactions on Magnetics

Magnetoresistive response of small permalloy features

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Authors

SDS. K. DeckerIBM (United States)CTC. TsangKarolinska University Hospital

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Implication

Experimental study reveals Néel wall instabilities drive Barkhausen noise in micron-sized permalloy sensors, indicating easy-axis magnetic fields suppress electrical interference.

Key Points

Investigate the origins and variations of Barkhausen noise in micron-sized permalloy magnetoresistive sensors to identify methods for noise suppression.
Characterized Barkhausen noise across a variety of micron-sized magnetoresistive sensor geometries.
Conducted magnetic domain observations to analyze underlying micromagnetic dynamics and wall behaviors.
Demonstrated that Néel wall structures and their instabilities play the primary role in generating Barkhausen noise.
Determined that applying a small easy-axis magnetic field promotes a rotational magnetization response, successfully yielding quiet magnetoresistive signal outputs.

Cite This Study

Decker et al. (1980) studied this question.

synapsesocial.com/papers/6a764fd54fac453bfeb1c1a2 https://doi.org/10.1109/tmag.1980.1060687

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Implication

Experimental study reveals Néel wall instabilities drive Barkhausen noise in micron-sized permalloy sensors, indicating easy-axis magnetic fields suppress electrical interference.

Magnetoresistive response of small permalloy features

Discussion

Member takes

Implication

Key Points

Cite This Study

Magnetoresistive response of small permalloy features

Discussion

Member takes

Implication

Key Points

Cite This Study

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