Results 11 to 20 of about 60,563 (256)
Scientific Reports, 2022 We experimentally demonstrated that heat-dissipation power driven by ferromagnetic resonance (FMR) in superparamagnetic nanoparticles of ferrimagnetic MFe2O4 (M = Fe, Mn, Ni) gives rise to highly localized incrementation of targeted temperatures.
Jae-Hyeok Lee +2 more
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Spin-Wave Wave Function for Quantum Spin Models [PDF]
Progress of Theoretical Physics, 1997 We present a new approach to determine an accurate variational wave function for general quantum spin models, completely defined by a consistency requirement with the simple and well known linear spin·wave expansion. With this wave function, it is also possible to obtain the correct behavior of the long distance correlation functions for the 1D S=1/2 ...
Franjic F, Sorella, Sandro
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Spin Waves in Quasiequilibrium Spin Systems [PDF]
Physical Review Letters, 2006 Using the Landau Fermi liquid theory we have discovered a new regime for the propagation of spin waves in a quasi-equilibrium spin systems. We have determined the dispersion relation for the transverse spin waves and found that one of the modes is gapless.
Bedell, Kevin S., Dahal, Hari P.
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Spin waves in spin hydrodynamics
Physical Review D, 2022 11 pages; 3 captioned figures; published ...
Victor E. Ambruş +2 more
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Optimizing machine learning models for granular NdFeB magnets by very fast simulated annealing
Scientific Reports, 2021 The macroscopic properties of permanent magnets and the resultant performance required for real implementations are determined by the magnets’ microscopic features. However, earlier micromagnetic simulations and experimental studies required relatively a
Hyeon-Kyu Park +3 more
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Scientific Reports, 2023 Recently developed permanent magnets, featuring specially engineered microstructures of inhomogeneous magnetic phases, are being considered as cost-effective alternatives to homogeneous single-main-phase hard magnets composed of Nd2Fe14B, without ...
Hyeon-Kyu Park, Sang-Koog Kim
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Spin waves in random spin chains [PDF]
Journal of Applied Physics, 2003 We study quantum spin-1/2 Heisenberg ferromagnetic chains with dilute random antiferromagnetic impurity bonds with the modified spin-wave theory. By describing thermal excitations in the language of spin waves, we observe a low-temperature Curie susceptibility due to the formation of large spin clusters first predicted by the real-space renormalization-
Wan, Xin +3 more
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Entropy, 2023 We demonstrate that an evanescent wave spin exists outside a finite quantum well by solving the Dirac equation in a finite cylindrical quantum well. The analytical analysis validates the wavefunction inside an infinite quantum well but recovers a non-zero evanescent wave outside the well.
Ju Gao, Fang Shen
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Magnetoelectric spin wave amplifier for spin wave logic circuits [PDF]
Journal of Applied Physics, 2009 We propose and analyze a spin wave amplifier aimed to enhance the amplitude of the propagating spin wave via the magnetoelectric effect. The amplifier is a two-layer multiferroic structure, which comprises piezoelectric and ferromagnetic materials. By applying electric field to the piezoelectric layer, the stress is produced.
Khitun, Alexander +2 more
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Introduction to Spin Wave Computing [PDF]
Journal of Applied Physics, 2020 This paper provides a tutorial overview over recent vigorous efforts to develop computing systems based on spin waves instead of charges and voltages. Spin-wave computing can be considered as a subfield of spintronics, which uses magnetic excitations for computation and memory applications.
Abdulqader Mahmoud +6 more
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