Electric-field tunable rotation of optical mode ferromagnetic resonance in FeCoB/Ru/FeCoB/PMN-PT multilayers

Zhou, Aoran; Li, Yuanzhe; Zhang, Shouheng; Huang, Yajing; Xue, Qian; Wang, Le; Zhao, Guoxia; Cao, Derang; Xu, Jie; Jin, Zhejun; Zong, W.; Wang, Xia; Li, Shandong; Miao, Guo‐Xing

doi:10.1016/j.jallcom.2021.163475

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…[1] The IEC was widely used in magnetic devices, [2,3] such as magnetic recording devices, giant magnetoresistance effect, tunneling magnetoresistance effect, [4][5][6][7][8] etc. The materials currently used to study IEC are mainly composed of Fe, [9][10][11] Co, [12] FeCo, [13] NiFe, [14][15][16][17] and FeCo alloys, [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] separated by non-ferromagnetic materials, such as Cu, [14,35] Cr, [9,36] and Ru. [3,[15][16][17][18][24][25][26]37] For the FM/NM/FM structure, the coupling strength and type of IEC are mainly related to the material compositions and the thickness value of FM layer and NM layer.…”

Section: Introductionmentioning

confidence: 99%

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Ru thickness-dependent interlayer coupling and ultrahigh FMR frequency in FeCoB/Ru/FeCoB sandwich trilayers

et al. 2022

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The antiferromagnetic (AFM) interlayer coupling effective field in the ferromagnetic/non-magnetic/ferromagnetic (FM/NM/FM) sandwich structures, as a driving force, can dramatically enhance the ferromagnetic resonance (FMR) frequency. Changing the non-magnetic spacer thickness is an effective way to control the interlayer coupling type and intensity, as well as the FMR frequency. In the study, FeCoB/Ru/FeCoB sandwich trilayers with Ru thickness (t Ru ) from 1 to 16 Å were prepared by a compositional gradient sputtering (CGS) method. It was revealed that a stress induced anisotropy is present in FeCoB films due to the B composition gradient in the samples. A t Ru dependent oscillation of interlayer coupling from FM to AFM with two periods was observed. An AFM coupling occurs in the range of 2 Å ≤ t Ru ≤ 8 Å and over 16 Å, while a FM coupling is present in the range of t Ru < 2 Å and 9 Å ≤ t Ru ≤ 14.5 Å. It is interesting that an ultrahigh optical mode (OM) FMR frequency in excess of 20 GHz was obtained in the sample with t Ru = 2.5 Å under an AFM coupling. The dynamic coupling mechanism in trilayers was simulated, and the corresponding coupling type at different t Ru was verified by Layadi's rigid model. This study provides a controllable way to prepare and investigate the ultrahigh FMR films.

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Section: Introductionmentioning

confidence: 99%

“…This leads to enlarged OM and reduced AM resonance peaks. [27][28][29][30][31][32][33][34][35] The resonance mode can be easily identified from the relative intensities of the resonance peaks.…”

Section: Introductionmentioning

confidence: 99%

Ru thickness-dependent interlayer coupling and ultrahigh FMR frequency in FeCoB/Ru/FeCoB sandwich trilayers

et al. 2022

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Inductance and Q‐Factor of Micromagnetic Inductor Are Enhanced by FeCoB Films with Self‐Bias

Sun,

Qiu,

et al. 2024

Physica Rapid Research Ltrs

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As technology progresses, the operational frequencies of electronic devices have migrated into the GHz range. As an important electronic device, the compatibility of the preparation process of inductors with integrated circuits also needs to be improved. Currently, most commercial inductors are constructed from ferrite materials, making them challenging to integrate with integrated circuits. Herein, FeCoB films with a self‐biased ferromagnetic frequency up to 21 GHz are deposited on Si substrates using the compositional gradient sputtering method as a magnetic underlayer. A reasonable inductance structure is designed using HFSS simulation software. A series of planar spiral inductors with various turns are fabricated by photolithographic micromachining on the FeCoB films with a polyimide insertion between them. The preparation process is completely based on semiconductor technology and has good compatibility with integrated circuits. The results show that the inductance L and quality factor Q are greatly improved by the introduction of high‐frequency FeCoB film. The inductance is improved by 71% and the quality factor is improved by 166%. This clearly demonstrates that FeCoB thin films are highly suitable for use as inductor cores and can be seamlessly integrated with integrated circuits, offering excellent prospects for use in high‐frequency integrated circuits.

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Lithiation bridged molecular conducting magnets

Wang,

Huang,

Gong

et al. 2024

Applied Materials Today

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Electric-field tunable rotation of optical mode ferromagnetic resonance in FeCoB/Ru/FeCoB/PMN-PT multilayers

Cited by 3 publications

References 36 publications

Ru thickness-dependent interlayer coupling and ultrahigh FMR frequency in FeCoB/Ru/FeCoB sandwich trilayers

Ru thickness-dependent interlayer coupling and ultrahigh FMR frequency in FeCoB/Ru/FeCoB sandwich trilayers

Inductance and Q‐Factor of Micromagnetic Inductor Are Enhanced by FeCoB Films with Self‐Bias

Lithiation bridged molecular conducting magnets

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