FMR Studies of Ultra-Thin Epitaxial Pd0.92Fe0.08 Film

Esmaeili, A.; Vakhitov, I. R.; Yanilkin, I. V.; Gumarov, A.I.; Khaliulin, B. M.; Gabbasov, B. F.; Aliyev, M. N.; Yusupov, R. V.; Тагиров, Л. Р.

doi:10.1007/s00723-017-0946-1

Cited by 14 publications

(16 citation statements)

References 21 publications

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“…The angular dependence of the FMR field for resonance (Fig. 3a) was analyzed using the free energy density expansion [54,55] assuming the cubic symmetry of the film lattice with small tetragonal distortion [37]:…”

Section: Fmr Quantification Of Magnetic Anisotropiesmentioning

confidence: 99%

“…Resonance field values were obtained by simultaneous solution of the system of Suhl and equilibrium equations [54,55] and for the particular case of Pd 0.92 Fe 0.08 in Ref. [37]. Upon fitting the FMR data, the saturation magnetization M s measured by VSM was used to provide the stable convergence of the fitting procedure with the minimal scatter of the freely varied parameters.…”

Section: Fmr Quantification Of Magnetic Anisotropiesmentioning

confidence: 99%

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Epitaxial thin-film Pd1−xFex alloy: a tunable ferromagnet for superconducting spintronics

et al. 2020

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Thin epitaxial films of the palladium-rich Pd 1−x Fe x alloy were synthesized and extensively studied as a tunable ferromagnetic material for superconducting spintronics. The (001)-oriented MgO single-crystal substrate and the composition range of x = 0.01-0.07 were chosen to support the epitaxial growth and provide the films with magnetic properties spanning from very soft ferromagnet for memory applications to intermediately soft and moderately hard for the programmable logic and circuit biasing, respectively. Dependences of the saturation magnetization, Curie temperature and three magnetic anisotropy constants on the iron content x were obtained for the first time from the analyses of the magnetometry and ferromagnetic resonance data. The experimental results were discussed based on existing theories of dilute ferromagnetic alloys. Simulation of the hysteresis loops within the Stoner-Wohlfarth model indicates the predominant coherent magnetic moment rotation at cryogenic temperatures. The obtained results were compiled in a database of magnetic properties of a palladium-iron alloy in a single-crystal thin-film form considered as a material for superconducting spintronics.

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Section: Fmr Quantification Of Magnetic Anisotropiesmentioning

confidence: 99%

Section: Fmr Quantification Of Magnetic Anisotropiesmentioning

confidence: 99%

Epitaxial thin-film Pd1−xFex alloy: a tunable ferromagnet for superconducting spintronics

et al. 2020

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“…The current revival of interest is fueled by the potential use as a material of a choice for a weak and soft ferromagnet in superconducting Josephson magnetic random-access memory (MRAM) based on Josephson junctions [4][5][6][7][8][9][10][11][12][13]. The Pd-rich ferromagnetic Pd 1−x Fe x (0.01 < x < 0.1) alloy is used there in the form of a thin film fabricated utilizing magnetron sputtering [5][6][7][8][9][10][11][13][14][15], molecular-beam epitaxy (MBE) [15][16][17][18][19][20][21][22][23], and ion-beam implantation [24].…”

Section: Introductionmentioning

confidence: 99%

“…There is a scatter of opinions on the compositional and magnetic homogeneity of Pd 1−x Fe x films obtained by different deposition techniques: some papers report an indication of clustering [10,11,13,14] or formation of the nanograins of the Pd 3 Fe phase [15] in samples deposited with the magnetron sputtering technique; the others on MBE growth of thin Pd 1−x Fe x films [18][19][20][21][22][23] report on their high magnetic homogeneity; finally, the ionimplanted palladium films [24] show a significant influence of the Fe implant distribution on saturation magnetization (M s ) and Curie temperature (T C ) of the samples. It is not clear why and how the redistribution of iron solute in the Pd matrix influences M s and T C .…”

Section: Introductionmentioning

confidence: 99%

Ab initio Investigation of Impurity Ferromagnetism in the Pd1−xFex Alloys: Concentration and Position Dependences

et al. 2021

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We present the results of ab initio studies of the structural and magnetic properties of the Pd host matrix doped by Fe atoms at various concentrations. By means of the density functional theory, we deduce that iron impurities are able to initialize significant magnetization of the Pd atoms, when the impurity concentration exceeds 3 at.%. We also demonstrate that the induced magnetization depends on impurity positions in the host matrix, in particular, there is a maximum of magnetization for a uniform distribution of the iron solute.

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“…Сплав Pd 1−x Fe при x < 0.1 является магнитомягким низкотемпературным ферромагнетиком (ФМ) [1] и перспективен для использования в элементах сверхпроводящей спинтроники и быстрой одноквантовой логики (RSFQ -rapid single-flux quantum) [2][3][4][5][6][7]. Изменяя концентрацию железа в сплаве и условия его приготовления, можно контролировать такие ключевые параметры, как температура Кюри T C и намагниченность насыщения M s [8,9], а также варьировать величину коэрцитивного поля и магнитокристаллической анизотропии [1]. Важной составляющей для реализации спинтронных устройств на базе тонкопленочных гетероструктур является возможность закрепления заданного направления намагниченности ФМ-слоя, что обычно достигается с использованием эффекта обменного сдвига (exchange bias) на границе ФМ-и антиферромагнитного слоев [10,11].…”

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Обменная пружина в гетероструктуре с низкотемпературным ферромагнетиком Pd-=SUB=-0.96-=/SUB=-Fe-=SUB=-0.04-=/SUB=-

Янилкин¹,

Mukhametova²,

Vakhitov³

et al. 2019

Письма В Журнал Технической Физики

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The exchange bias of the magnetic hysteresis loop and the exchange-spring effect have been observed in thin-film heterostructures comprising layers of Pd_0.96Fe_0.04 low-temperature ferromagnet, metallic cobalt, and cobalt monoxide (CoO) grown on single-crystalline sapphire by methods of magnetron sputtering and molecular beam epitaxy in an ultrahigh-vacuum system. It is established that the exchange anisotropy of Pd_0.96Fe_0.04 layer in Pd_0.96Fe_0.04/CoO/Co/Al_2O_3 thin-film heterostructure is absent and the exchange-spring effect in this system is not manifested. In the case of a Pd_0.96Fe_0.04/Co/CoO/Al_2O_3 structure, it is shown that, according to the results of magnetometric measurements, the inversion of the order of antiferromagnetic and ferromagnetic layers leads to pinning of the magnetic moment of Pd_0.96Fe_0.04 layer at the interface with cobalt and to realization of the exchange-spring effect. Additional evidence in favor of this interpretation was obtained using the micromagnetic modeling of magnetic hysteresis loops.

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FMR Studies of Ultra-Thin Epitaxial Pd0.92Fe0.08 Film

Cited by 14 publications

References 21 publications

Epitaxial thin-film Pd1−xFex alloy: a tunable ferromagnet for superconducting spintronics

Epitaxial thin-film Pd1−xFex alloy: a tunable ferromagnet for superconducting spintronics

Ab initio Investigation of Impurity Ferromagnetism in the Pd1−xFex Alloys: Concentration and Position Dependences

Обменная пружина в гетероструктуре с низкотемпературным ферромагнетиком Pd-=SUB=-0.96-=/SUB=-Fe-=SUB=-0.04-=/SUB=-

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