Spin-Current Generation in Low-Damping 
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Gray, Matthew; Emori, Satoru; Gray, Barbara; Jeon, Hyung-Min; Erve, O.M.J. van ‘t; Jonker, B. T.; Kim, S.; Suzuki, Motohiro; Ono, Teruo; Howe, B. M.; Suzuki, Yuri

doi:10.1103/physrevapplied.9.064039

Cited by 24 publications

(6 citation statements)

References 61 publications

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“…[36][37][38] The SMR data of all the samples is nicely fitted, yielding the values of  G r and λ. While these values are comparable to many reported values in the literature of Pt/magnetic insulator bilayers, [10][11][12][13][14][15][16][17][18][19][26][27][28][29] we do not further discuss the λ since our focus is the  G r that greatly influences the SMR; the λ ranges from 0.8 to 1.3 nm, consistent with previous reports. 3,4,12,19,29) Here, all the values of  G r is summarized in Table I.…”

supporting

confidence: 89%

“…Actually, a sizable SMR has been reported in Pt/spinel ferrite bilayers. [22][23][24][25][26][27][28][29][30] We choose MgFe 2 O 4 (MFO) in which Fe 3+ is the only magnetic ion. The crystal structure of MFO is a mixture of normal and inverse spinels; the ratio of the inverse spinel is referred to as an inversion parameter.…”

mentioning

confidence: 99%

“…We also focus on quality of the interface between MFO and Pt. In most of the previous reports, [10][11][12][13][14][15][16][17][18][19]22,23,26,[28][29][30] Pt is ex situ deposited on the magnetic insulators and hence its interface quality is not well defined. According to the presence or absence of annealing of the MFO surface before depositing Pt, we can control the interface quality.…”

mentioning

confidence: 99%

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Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers

Sugino,

Ueda,

Kida

et al. 2023

Appl. Phys. Express

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We report on spin Hall magnetoresistance (SMR) in bilayers composed of Pt and magnetic insulator MgFe2O4 (MFO) with spinel structure. The Pt thickness dependence of the SMR reveals that annealing of the MFO surface before depositing the Pt layer is crucial for a large SMR with better interface quality. We also found that oxygen pressure during the MFO growth hardly affects the SMR while it influences on magnetic property of the MFO film. Our findings provide important clues to further understand the spin transport at interfaces containing magnetic insulators, facilitating development of low power consumption devices.

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supporting

confidence: 89%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers

Sugino,

Ueda,

Kida

et al. 2023

Appl. Phys. Express

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“…31 These materials challenges motivate the search for additional low-damping magnetic thin films that can operate as quantum interconnects. Some potential candidates including Co-Fe alloys, 267 (Ni, Zn, Al) ferrite, 268 and organic vanadium tetracyanoethylene (V[TCNE] x ). 269,270 Beyond diamond NV centers, developing quantum defects in other host materials, 261,271 opens up opportunities for designing defect-host systems with properties specifically tailored for magnonic hybrid systems.…”

Section: Materials Outlook For Magnonic Hybrid Quantum Systemsmentioning

confidence: 99%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

114

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Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design and dynamic operation. In particular, the integration of different quantum modules has benefited from hybrid quantum systems, which provide an important pathway for harnessing the different natural advantages of complementary quantum systems and for engineering new functionalities. This review focuses on the current frontiers with respect to utilizing magnetic excitatons or magnons for novel quantum functionality. Magnons are the fundamental excitations of magnetically ordered solid-state materials and provide great tunability and flexibility for interacting with various quantum modules for integration in diverse quantum systems. The concomitant rich variety of physics and material selections enable exploration of novel quantum phenomena in materials science and engineering. In addition, the relative ease of generating strong coupling and forming hybrid dynamic systems with other excitations makes hybrid magnonics a unique platform for quantum engineering. We start our discussion with circuit-based hybrid magnonic systems, which are coupled with microwave photons and acoustic phonons. Subsequently, we are focusing on the recent progress of magnon-magnon coupling within confined magnetic systems. Next we highlight new opportunities for understanding the interactions between magnons and nitrogen-vacancy centers for quantum sensing and implementing quantum interconnects. Lastly, we focus on the spin excitations and magnon spectra of novel quantum materials investigated with advanced optical characterization.

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“…For reasons of a meaningful device realization, we note here that a suitable candidate for the ferromagnetic substrate must be insulating inasmuch as additional leakage paths are cut-off and the thermal current is confined to the X-ene channel only; yttrium-iron-garnet (YIG) 9,10 with a high Curie temperature of ≈ 550 K and demonstrated ease of integration with 2D material fabrication steps 11 can be considered relevant for the present caloritronic setup. Besides, since thermal generation of spin current is envisioned as a key outcome, it is also pertinent to mention about the substrate, spinel ferrite (NZFAO), which supposedly in comparison to YIG-type materials, may improve the transfer of spin across the device 12 .…”

Section: Introductionmentioning

confidence: 99%

Spin-valley coupled thermoelectric energy converter with strained honeycomb lattices

Sengupta

Rakheja

2020

Physica E: Low-dimensional Systems and Nanostructures

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A caloritronic device setup is proposed that harnesses the intrinsic spin-valley locking of two-dimensional honeycomb lattices with graphene-like valleys, for instance, silicene and stanene. Combining first-principles and analytic calculations, we quantitatively show that when sheets of such materials are placed on a ferromagnetic substrate and held between two contacts at different temperatures, an interplay between the electron degrees-of-freedom of charge, spin, and valley arises. A manifestation of this interplay are finite charge, spin, and valley currents. Uniaxial strain that adjusts the buckling height in silicene-type of lattices, in conjunction with an applied electric field, is shown to further modulate the aforementioned currents. We link these calculations to a Seebeck-like thermopower generator and obtain expressions (and means to optimize them) for two spin-valley polarized performance metrics-the thermodynamic efficiency and thermoelectric figure of merit. A closing summary outlines possible enhancements to presented results through the inherent topological order and substrate-induced external Rashba spin-orbit coupling that exists in silicene-type materials.arXiv:1905.00984v1 [cond-mat.mtrl-sci]

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Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8

Cited by 24 publications

References 61 publications

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Spin-valley coupled thermoelectric energy converter with strained honeycomb lattices

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Spin-Current Generation in Low-Damping Ni0.65Zn0.35Al0.8

Cited by 24 publications

References 61 publications

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe2O4 bilayers

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe2O4 bilayers

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Spin-valley coupled thermoelectric energy converter with strained honeycomb lattices

Contact Info

Product

Resources

About

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers

Effect of interface quality on spin Hall magnetoresistance in Pt/MgFe₂O₄ bilayers