Magneto-optic indicator film observations of domain motion in magnetostrictive materials under stress

Shull, Robert D.; Quandt, Eckhard; Shapiro, Alexander J.; Glasmachers, Stefan; Wuttig, Manfred

doi:10.1063/1.1689773

Cited by 13 publications

(8 citation statements)

References 9 publications

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“…Nevertheless, replacing a magnetic field with a piezoelectric stress is not straightforward, because a magnetic field contributes unidirectionally to the magnetic energy landscape. Stress, on the contrary, leads to a uniaxial anisotropy, altering the magnetic energy landscape in a symmetric manner, thus also leading to more complicated magnetic reversal patterns [416,417]. Alternatively, the deltaE effect is exploited by means of resonators, which elastic moduli and in turn their resonant frequency is strongly dependent on the magnetization configuration.…”

Section: Lf Me Sensorsmentioning

confidence: 99%

Roadmap on Magnetoelectric Materials and Devices

et al. 2021

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The possibility to tune the magnetic properties of materials with voltage (converse magnetoelectricity) or to generate electric voltage with magnetic fields (direct magnetoelectricity) has opened new avenues in a large variety of technological fields, ranging from information technologies to healthcare devices and including a great number of multifunctional integrated systems such as mechanical antennas, magnetometers, radiofrequency (RF) tunable inductors, etc., which have been realized due to the strong strainmediated magnetoelectric (ME) coupling found in ME composites. The development of singlephase multiferroic materials (which exhibit simultaneous ferroelectric and ferromagnetic or antiferromagnetic orders), multiferroic heterostructures, as well as progress in other ME mechanisms, such as electrostatic surface charging or magneto-ionics (voltage-driven ion migration) have a large potential to boost energy efficiency in spintronics and magnetic actuators. This paper focuses on existing ME materials and devices and reviews the state of the art in their

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Section: Lf Me Sensorsmentioning

confidence: 99%

Roadmap on Magnetoelectric Materials and Devices

et al. 2021

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“…Recently Shull and coworkers [21] studied the influence of stress on domain wall structure in similar multilayers using the magneto-optic indicator film (MOIF) technique that reveals domains by an indirect effect of their stray field. They show that magnetization reversibly rotates when stress is applied whereas magnetization rotation under field application is irreversible and includes wall motion.…”

Section: +7°fmentioning

confidence: 99%

Magnetostrictive hysteresis of TbCo∕CoFe multilayers and magnetic domains

Jay

Petit

Youssef

et al. 2006

Journal of Applied Physics

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Magnetic and magnetostrictive hysteresis loops of TbCo/CoFe multilayers under field applied along the hard magnetization axis are studied using vectorial magnetization measurements, optical deflectometry and magneto optical Kerr microscopy. Even a very small angle misalignment between hard axis and magnetic field direction is shown to drastically change the shape of magnetization and magnetostrictive torsion hysteresis loops. Two kinds of magnetic domains are revealed during the magnetization: big regions with opposite rotation of spontaneous magnetization vector and spontaneous magnetic domains which appear in a narrow field interval and provide an inversion of this rotation.We show that the details of the hysteresis loops of our exchange-coupled films can be described using the classical model of homogeneous magnetization rotation of single uniaxial films and the configuration of observed domains. The understanding of these features is crucial for applications (for MEMS or microactuators) which benefit from the greatly enhanced sensitivity near the point of magnetic saturation at the transverse applied field.

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“…M AGNETOOPTICAL (MO) imaging and sensing devices utilizing Bi-substituted iron garnet films are widely used to examine the spatial distribution of magnetic fields produced by magnetized objects [1]- [5], to study the vortex matter in high-temperature superconductors [6], and as current sensors [7]. Depending on the properties of the objects under study, the sensing films with in-plane, inclined, and perpendicular orientation of the magnetization vector with respect to the film plane are used [1].…”

Section: Introductionmentioning

confidence: 99%

Novel Magnetic Photonic Crystal Structures for Magnetic Field Sensors and Visualizers

Vasiliev

Котов²,

Alameh

et al. 2008

IEEE Trans. Magn.

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Optimized one-dimensional (1-D) magnetophotonic crystals greatly increase the sensitivity of magnetooptical sensors, which are widely used in magnetooptical imaging to observe the magnetic domain patterns in magnetic materials, to observe the vortex states in superconductors, to detect small bits in magnetooptical recording media, to visualize defects in ferromagnetic objects, and to measure the value and spatial distribution of stray magnetic fields. This paper examines the properties of such devices operating in the optimized reflection (doubled Faraday rotation) mode and discusses the use of 1-D magnetophotonic crystals as sensors.Index Terms-Magnetic domains, magnetic photonic crystals, magnetooptical magnetic field sensors.

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Magneto-optic indicator film observations of domain motion in magnetostrictive materials under stress

Cited by 13 publications

References 9 publications

Roadmap on Magnetoelectric Materials and Devices

Roadmap on Magnetoelectric Materials and Devices

Magnetostrictive hysteresis of TbCo∕CoFe multilayers and magnetic domains

Novel Magnetic Photonic Crystal Structures for Magnetic Field Sensors and Visualizers

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