Investigation of strain-induced magnetization change in ferromagnetic microparticles

Chuklanov, A. P.; Nurgazizov, N. I.; Bizyaev, D. A.; Khanipov, T. F.; Бухараев, А. А.; Petukhov, V. Yu.; Chirkov, V. V.; Гумаров, Г. Г.

doi:10.1088/1742-6596/714/1/012006

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…Its saturation magnetostriction constant [ 23 ] ( λ s ) is −25 × 10 −6 and the thermal expansion coefficient [ 24 ] is

13 \times 10^{- 6} {normalK}^{- 1}

. The deposition by electron beam evaporation through a metal mesh with square holes tightly pressed to the substrate surface was performed in ultrahigh vacuum [ 15,17 ] at two temperatures: 300 and 400 K.…”

Section: Figurementioning

confidence: 99%

“…The magnetic force microscopy (MFM), [ 1,15–17 ] magneto‐optical Kerr effect (MOKE), [ 1,6,7,15 ] ferromagnetic resonance (FMR), [ 1,11,12,18 ] magnetorefractive effect, [ 19 ] and photoemission electron microscopy (PEEM) [ 20,21 ] can be used for studying the magnetoelastic effect. In our previous works, the transformation of domain structure in permalloy and CoNi microparticles under mechanical stress induced by substrate bending was studied.…”

mentioning

confidence: 99%

“…In particular, it was shown by FMR, MOKE, and MFM methods that the magnetoelastic anisotropy induced in permalloy particles of size 25 × 25 × 0.03 μm 3 leads to the transformation of 4‐domain Landau structure. [ 1,10,15 ] The transformation of Landau structure was also registered by PEEM in square Ni microparticles of 2 × 2 μm 2 on piezoelectric substrate when it was compressing or expanding. [ 20 ] Mechanical stress on the same microparticles was induced by standing surface acoustic waves generated in a lithium niobate (LiNbO 3 ) single‐crystal substrate.…”

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confidence: 99%

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Thermally Induced Magnetoelastic Effect in Planar CoNi Microparticles on Lithium Niobate

Bizyaev

Бухараев

Nurgazizov

et al. 2020

Physica Rapid Research Ltrs

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The temperature effect on the magnetization distribution in planar CoNi microparticles deposited on hexagonal single‐crystal lithium niobate has been studied. The transition of the magnetization distribution of such microparticles from multidomain to quasiuniform state by changing the substrate temperature has been demonstrated. It is established that the transition into the quasiuniform state occurs upon heating/cooling of the sample with respect to the deposition temperature of the microparticles. This is due to the noticeable difference in the thermal expansion coefficients along various crystallographic axes of lithium niobate. The uniaxial mechanical stresses are induced in the CoNi microparticles deposited on the crystal at the thermal change in the crystal size. The stresses induced in this manner are determined. In addition, this makes it possible to reduce the external magnetic field required for magnetization switching up to two times.

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“…Its saturation magnetostriction constant [ 23 ] ( λ s ) is −25 × 10 −6 and the thermal expansion coefficient [ 24 ] is

13 \times 10^{- 6} {normalK}^{- 1}

Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Thermally Induced Magnetoelastic Effect in Planar CoNi Microparticles on Lithium Niobate

Bizyaev

Бухараев

Nurgazizov

et al. 2020

Physica Rapid Research Ltrs

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“…В качестве носителя может выступать паттернированная среда, состоящая из частиц. Кроме этого, для управления намагниченностью этих частиц можно использовать маг-нитоупругий эффект [5,6]. Создавая в частице одноосные механические напряжения, можно не только снизить ее коэрцитивную силу, но и изменять направление намагниченности без приложения внешнего поля, что позволяет существенно улучшить энергоэффективность таких устройств [7].…”

Section: Introductionunclassified

Термоиндуцированное изменение поля переключения планарных CoNi-микрочастиц, сформированных на поверхности монокристаллического ниобата лития

Бизяев¹,

Нургазизов²,

Бухараев³

et al. 2021

Физика Твердого Тела

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Методами магнитно-силовой микроскопии были исследованы магнитные свойства (поле переключения) и переходы из многодоменного в однодоменное состояние планарных микрочастиц Co18Ni82 размером 7.5x7.5x0.03 μm3 при различных температурах. Использование в качестве подложки гексагонального монокристалла ниобата лития, обладающего отличающимися температурными коэффициентами линейного расширения вдоль разных кристаллографических осей, позволило индуцировать одноосные механические напряжения в микрочастицах путем относительно небольшого нагрева или охлаждения образца по сравнению с его температурой напыления. Показано, что за счет термоиндуцированного магнитоупругого эффекта увеличение температуры всего на 50 K может привести к семикратному уменьшению величины поля переключения. Ключевые слова: магнитоупругий эффект, магнитная силовая микроскопия, перемагничивание, ниобат лития, температура.

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“…Another method of creating stress in particles is the elastic bending of the substrate. The substrates can be also bent before the particles are formed and to create stresses in the particles by straightening the substrate [2,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

MFM Study of the Domain Structure of Permalloy Microparticles under Mechanical Stress

2018

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Abstract. The domain structure of planar permalloy (Py) microparticles was studied under mechanical stress. An array of Py particles was formed by electron beam evaporation of Py on flat and preliminarily bent glass substrates. After evaporation the substrate was unbent and the Py particles were compressed along one axis. The change of the domain structure of stressed particles in comparison with that of unstressed particles was studied. It was shown that the change of the domain structure of Py particles depends on their compression ratio.

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Investigation of strain-induced magnetization change in ferromagnetic microparticles

Cited by 5 publications

References 4 publications

Thermally Induced Magnetoelastic Effect in Planar CoNi Microparticles on Lithium Niobate

Thermally Induced Magnetoelastic Effect in Planar CoNi Microparticles on Lithium Niobate

Термоиндуцированное изменение поля переключения планарных CoNi-микрочастиц, сформированных на поверхности монокристаллического ниобата лития

MFM Study of the Domain Structure of Permalloy Microparticles under Mechanical Stress

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