Maximizing modulation efficiency to minimize 1/f noise in magnetoresistance

Hou, Yuyu; Wang, Dong F.; Itoh, Toshihiro

doi:10.1016/j.measurement.2022.112396

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…These limitations are partly overcome by modulation schemes to avoid the low-frequency flicker noise of the electronics. [37][38][39][40] Yet, correlated magnetic or magnetomechanical excitations lead to added performance limitations caused by additional intrinsic magnetic noise in the magnetic layers. [41][42][43][44] Magnetic noise is a highly complex phenomenon, and understanding its origin has led to extensive research for various systems.…”

Section: Introductionmentioning

confidence: 99%

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A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

Spetzler,

McCord

2023

Adv Funct Materials

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Intrinsic magnetic noise limits the functionality of all magnetic field sensors and related devices using magnetic films as sensing elements. A novel origin of magnetic noise due to ferromagnetic material's magnetostriction is revealed by implementing a comprehensive multi‐level signal‐noise model and thoroughly validating it experimentally on magnetoelectric composite ΔE‐effect sensors. From electrical measurements and operando magnetic domain visualization, magnetic contributions are shown to dominate the noise floor and limit the overall performance of multi‐domain magnetoelastic sensors. The newly introduced noise contribution is correlated with the nonlinearity of the magnetostrictive properties. The effect on sensor output is particularly pronounced in magnetoelastic and magnetoelectric composite devices, but the results generally apply to all sensor devices incorporating magnetic materials. Therefore, the identified magnetic noise source makes a significant contribution to understanding the limitations of magnetic sensors and provides important guidelines for optimizing future magnetic sensors for low detectivity.

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Section: Introductionmentioning

confidence: 99%

“…These limitations are partly overcome by modulation schemes to avoid the low‐frequency flicker noise of the electronics. [ 37–40 ] Yet, correlated magnetic or magnetomechanical excitations lead to added performance limitations caused by additional intrinsic magnetic noise in the magnetic layers. [ 41–44 ]…”

Section: Introductionmentioning

confidence: 99%

A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

Spetzler,

McCord

2023

Adv Funct Materials

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“…In a MOKE-based measurement system, overcoming signal interference is one of the parameters that must be carried out, but until now there is still little research that discusses the interference that exists in the MOKE system. There are lots of noise type could be found in optical-based measurement system, two of them are butterfly noise and 1/f noise [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Dynamics Noise Behaviors on Magneto-Optical Kerr Effect Measurement System

Handoko

Kim

2023

IPR

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Nowadays, computer and data processing industry are moving to nanomagnetic devices technology. One of the common measurement systems to observe nanomagnetic device are magneto optical Kerr effect and Faraday effects. The magneto-optical Kerr effect measurement system has been fabricated and precision noise measurement configuration was observed. A light intensity, which was reflected by thin film nanomagnetic surface, was measured accompany with its noise level. The lock-in amplifier was attached to pick up hysteresis signal and low noise level. Different frequency of lock-in amplifier was carried out to observe dynamics noise level behavior. Interestingly, we found butterfly shape noise corresponding to hysteresis loop shape. Furthermore, noise behavior with 0.94 scaling exponent, was found with respect to lock-in amplifier frequencies suggested that measuring in low frequency became more challenging.

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Optimizing free layer of Magnetic Tunnel Junction for true random number generator

P.B.,

Warrier

2023

Memories - Materials, Devices, Circuits and Systems

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Maximizing modulation efficiency to minimize 1/f noise in magnetoresistance

Cited by 4 publications

References 27 publications

A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

A Magnetoelastic Twist on Magnetic Noise: The Connection with Intrinsic Nonlinearities

Dynamics Noise Behaviors on Magneto-Optical Kerr Effect Measurement System

Optimizing free layer of Magnetic Tunnel Junction for true random number generator

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