Dynamic magnetic behaviors in the Ising-type nanowire with core-shell single-ion anisotropies under a time-dependent oscillating external magnetic field

Ferrofluids prepared by dispersing superparamagnetic Fe3O4@C core–shell nanoparticles in water exhibited exceptional enhancement in thermal conductivity without an external magnetic field.

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The Composition and Magnetic Structure of Fe3O4/γ-Fe2O3 Core-Shell Nanocomposites under External Magnetic Field: Mössbauer Study (Part II)

Physics of the Solid State ◽

10.1134/s1063783420110153 ◽

2020 ◽

Vol 62 (11) ◽

pp. 2167-2172

Author(s):

A. S. Kamzin ◽

I. M. Obaidat ◽

A. A. Valliulin ◽

V. G. Semenov ◽

I. A. Al-Omari

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Magnetic Structure ◽

Core Shell ◽

Mössbauer Study

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Time-dependent topological Chern-Simons solitons in external magnetic field

Physical Review D ◽

10.1103/physrevd.44.3906 ◽

1991 ◽

Vol 44 (12) ◽

pp. 3906-3910 ◽

Cited By ~ 5

Author(s):

Z. F. Ezawa ◽

M. Hotta ◽

A. Iwazaki

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Time Dependent ◽

Chern Simons

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Dynamic magnetic behaviors of a double-layer core/shell graphene nanoribbon in a time-dependent magnetic field

Results in Physics ◽

10.1016/j.rinp.2020.103573 ◽

2020 ◽

Vol 19 ◽

pp. 103573

Author(s):

Wei Wang ◽

Lei Sun ◽

Run-dong Li ◽

Zhong-yue Gao ◽

Feng Wang ◽

...

Keyword(s):

Magnetic Field ◽

Double Layer ◽

Graphene Nanoribbon ◽

Time Dependent ◽

Core Shell

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Dynamics of vortex–antivortex creation and annihilation in current-driven mesoscopic superconducting squares

Modern Physics Letters B ◽

10.1142/s0217984915502474 ◽

2015 ◽

Vol 29 (35n36) ◽

pp. 1550247

Author(s):

Xiao-Meng Liang ◽

Guo-Qiao Zha

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Landau Theory ◽

Symmetric Case ◽

Time Dependent ◽

Dynamical Process ◽

Applied Bias ◽

Ginzburg Landau ◽

Dc Drive ◽

Vortex Velocity

In this paper, based on the time-dependent Ginzburg–Landau theory, we study the dynamics of vortex–antivortex (V–Av) pairs in a mesoscopic superconducting square with a small hole under applied bias currents. For the sample with a centered hole, a V–Av pair can nucleate at the hole edges and moves in opposite directions perpendicular to applied constant DC drive. The influence of the external magnetic field on the (anti)vortex velocity and the lifetime of V–Av pairs is mainly investigated. Different modes in the dynamical process of the V–Av collision and annihilation are identified. Moreover, in the case when the hole is displaced from the center of the square, the V–Av dynamics behaves quite differently from the symmetric case due to the shift of the V–Av creation point.

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Multilevel Spin Dynamics in Time-Dependent External Magnetic Field

Acta Physica Hungarica ◽

10.1556/aph.26.2006.1-2.7 ◽

2006 ◽

Vol 26 (1-2) ◽

pp. 47-54

Author(s):

Péter Földi ◽

Mihály G. Benedict ◽

Francois M. Peeters

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Spin Dynamics ◽

Time Dependent

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Мёссбауэровские исследования состава и магнитной структуры нанокомпозитов Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=-/γ-Fe-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=- типа ядро-оболочка во внешнем магнитном поле (Часть 2)

Физика твердого тела ◽

10.21883/ftt.2020.11.50071.062 ◽

2020 ◽

Vol 62 (11) ◽

pp. 1919

Author(s):

А.С. Камзин ◽

I.M. Obaidat ◽

А.А. Валлиулин ◽

В.Г. Семенов ◽

I.A. Al-Omari

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Spin Structure ◽

Magnetic Moments ◽

Core Shell ◽

Fe2o3 Nanoparticles ◽

Synthesis Conditions ◽

The Core ◽

Canted Spin ◽

Shell Particles

The results of Mössbauer studies of the composition and magnetic structure of Fe3O4 / -Fe2O3 nanoparticles placed in an external magnetic field with a strength of 1.8 kOe, which is a continuation of the work [A.S. Kamzin, I.M. Obaidat, A.A. Valliulin, V.G. Semenov, I.A. Al-Omari. FTT No. 10/2020]. It is shown that the thickness of the maghemite (-Fe2O3) shell can be changed by the synthesis conditions. It was found that on the surface of the maghemite (-Fe2O3) shell in the Fe3O4 / -Fe2O3 nanocomposites there is a layer in which the magnetic moments are not oriented collinearly to the moments located in the depth of the shell, i.e., there is a canted spin structure. An intermediate layer in the spin-glass state is formed between the core and the shell. The data obtained on the structure of core / shell particles are important for understanding the properties of nanocomposites, which are of great interest for applications in various fields, including biomedicine.

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