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We developed a new technique for measuring the thermodynamic entropy as a function of the magnetic field angle. This technique enables high-resolution angle-resolved measurements of the entropy in an unprecedentedly short measuring time.…

Strongly Correlated Electrons · Physics 2018-06-15 Shunichiro Kittaka , Shota Nakamura , Hiroaki Kadowaki , Hiroshi Takatsu , Toshiro Sakakibara

Influence of perpendicular magnetic field on the process of transversal saturation of ferromagnetic films with spin-polarized current is studied theoretically. It is shown that the saturation current $J_s$ is decreased (increased) in case…

Mesoscale and Nanoscale Physics · Physics 2012-12-17 Oleksii M. Volkov , Volodymyr P. Kravchuk

Magnetic field line curvature (FLC) scattering is an effective mechanism for collisionless particle scattering. In the terrestrial magnetosphere, the FLC scattering plays an essential role in shaping the outer boundary of protons radiation…

Space Physics · Physics 2024-03-18 Bin Cai , Hui Zhu

An anomalous (inverse) spin accumulation in the nonmagnetic spacer may build up when the spin valve consists of magnetic films having different spin symmetries. This leads to wavy-like dependence of spin-transfer torque on the angle between…

Mesoscale and Nanoscale Physics · Physics 2010-04-12 E. Jaromirska , P. Balaz , L. Lopez Diaz , J. Barnas

To address thermal stability issues for spintronic devices with a reduced size, we investigate spin-orbit torque in Co/Pt multilayers with strong perpendicular magnetic anisotropy. Note that the spin-orbit torque arises from the global…

Materials Science · Physics 2015-12-15 Kuo-Feng Huang , Ding-Shuo Wang , Hsiu-Hau Lin , Chih-Huang Lai

The mechanism by which the Earth's magnetic field is generated is thought to be thermal convection in the metallic liquid iron core. Computational considerations previously restricted most numerical simulations to a regime where the…

Geophysics · Physics 2017-01-17 Andrey Sheyko , Christopher Finlay , Jean Favre , Andrew Jackson

Magnetization measurements were performed to investigate the critical behavior of the field-induced magnetic ordering in gapped spin system TlCuCl$_3$. The critical density of the magnons was obtained as a function of temperature and the…

Strongly Correlated Electrons · Physics 2015-05-13 Fumiko Yamada , Toshio Ono , Hidekazu Tanaka , Gregoire Misguich , Masaki Oshikawa , Toshiro Sakakibara

The magnetization characteristic in a permalloy thin strip is investigated by electrically measuring the anisotropic magnetoresistance and ferromagnetic resonance in in-plane and out-of-plane configurations. Our results indicate that the…

Materials Science · Physics 2014-03-05 Ziqian Wang , Guolin Yu , Xinzhi Liu , Bo Zhang , Xiaoshuang Chen , Wei Lu

The current driven magnetization dynamics of a thin-film, three magnetic terminal device (spin-flip transistor) is investigated theoretically. We consider a magnetization configuration in which all magnetizations are in the device plane,…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Xuhui Wang , Gerrit E. W. Bauer , Teruo Ono

The magnetic moment of an electron gas on the surface of constant negative curvature is investigated. It is shown that the surface curvature leads to the appearance of the region of the monotonic dependence $M(B)$ at low magnetic fields. At…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 D. V. Bulaev , V. A. Margulis

We present an analytical and experimental study of torsional magnetic mechanism where the restoring torque is due to magnetic field interactions between rotating and fixed permanent magnets. The oscillator consists of a ball…

Signal Processing · Electrical Eng. & Systems 2022-06-15 Ali Kanj , Rhinithaa P. Thanalakshme , Chengzhang Li , John Kulikowski , Gaurav Bahl , Sameh Tawfick

Boundary conditions for unconventional superconducting order parameter are obtained on the basis of a microscopic theory. The upper critical field in a superconducting film is examined for unconventional superconductors with two-component…

Condensed Matter · Physics 2009-10-28 Yu. S. Barash , A. V. Galaktionov , A. A. Svidzinsky

We propose a method for inducing magnetization reversal using an AC spin current polarized perpendicular to the equilibrium magnetization of the free magnetic layer. We show that the critical AC spin current is significantly smaller than…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 Tom Dunn , Alex Kamenev

A compelling feature of relativistic mean-field phenomenology has been the reproduction of spin-orbit splittings in finite nuclei after fitting only to equilibrium properties of infinite nuclear matter. This successful result occurs when…

Nuclear Theory · Physics 2009-10-30 R. J. Furnstahl , John J. Rusnak , Brian D. Serot

This paper reviews the state of the art in spin-torque and spin Hall effect driven nano-oscillators. After a brief introduction to the underlying physics, the authors discuss different implementations of these oscillators, their functional…

We study the onset of spin superfluidity, namely coherent spin transport mediated by a topological spin texture, in frustrated exchange-dominated magnetic systems, engendered by an external magnetic field. We show that for typical device…

Mesoscale and Nanoscale Physics · Physics 2021-05-26 Ricardo Zarzuela , Daniel Hill , Jairo Sinova , Yaroslav Tserkovnyak

In this work, we have studied oscillations in the crust of a neutron star which magnetic field has both dipolar and toroidal components, the former extends from the stellar interior to the outer space and the later is confined inside the…

General Relativity and Quantum Cosmology · Physics 2020-02-05 Gibran Henrique de Souza , Ernesto Kemp

We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 degrees C and characterized using x-ray absorption spectroscopy,…

The conductance through a local nuclear spin precessing in a magnetic field is studied by using the equations-of-motion approach. The characteristics of the conductance is determined by the tunneling matrix and the position of equilibrium…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Jian-Xin Zhu , A. V. Balatsky

The quantum size effect on the in-plane paramagnetic critical field in Pb nanofilms is investigated with the use of the spin-generalized Bogolubov-de Gennes equations. It is shown that the critical field oscillates as a function of the…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 P. Wójcik , M. Zegrodnik
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