COMPUTER-SIMULATION STUDY OF MAGNETIC-RELAXATION IN ANISOTROPIC MAGNETIC SYSTEMS

被引：13

作者：

GONZALEZMIRANDA, JM

TEJADA, J

机构：

[1] Departamento de Física Fundamental, Universidad de Barcelona, 08028 Barcelona, Av. Diagonal

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.49.3867

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a computer-simulation study of the effect of the distribution of energy barriers in an anisotropic magnetic system on the relaxation behavior of the magnetization. While the relaxation law for the magnetization can be approximated in all cases by a time logarithmic decay, the law for the dependence of the magnetic viscosity with temperature is found to be quite sensitive to the shape of the distribution of barriers. The low-temperature region for the magnetic viscosity never extrapolates to a positive no-null value. Moreover our computer simulation results agree reasonably well with some recent relaxation experiments on highly anisotropic single-domain particles.

引用

页码：3867 / 3873

页数：7

共 19 条

[1] QUANTUM TUNNELING OF MAGNETIZATION IN METALLIC FEC FERROFLUIDS [J].

BALCELLS, LI ;

THOLENCE, JL ;

LINDEROTH, S ;

BARBARA, B ;

TEJADA, J .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1992, 89 (02) :209-212

[2] FLUX CREEP IN TYPE-2 SUPERCONDUCTORS [J].

BEASLEY, MR ;

LABUSCH, R ;

WEBB, WW .

PHYSICAL REVIEW, 1969, 181 (02) :682-&

[3]

Binder K., 1979, MONTE CARLO METHODS, P204, DOI [10.1007/978-3-642-96483-1, DOI 10.1007/978-3-642-96483-1]

[4]

CHANTRELL RW, 1986, J PHYS F MET PHYS, V16, P6145

[5] QUANTUM TUNNELING OF MAGNETIZATION IN SMALL FERROMAGNETIC PARTICLES [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW LETTERS, 1988, 60 (08) :661-664

[6] QUANTUM-THEORY OF NUCLEATION IN FERROMAGNETS [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW B, 1988, 37 (16) :9455-9459

[7] MODEL SYSTEM FOR SLOW DYNAMICS [J].

LOTTIS, DK ;

WHITE, RM ;

DAHLBERG, ED .

PHYSICAL REVIEW LETTERS, 1991, 67 (03) :362-365

[8] MAGNETIC AFTEREFFECT IN COCR FILMS [J].

LOTTIS, DK ;

DAHLBERG, ED ;

CHRISTNER, JA ;

LEE, JI ;

PETERSON, RL ;

WHITE, RM .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (08) :2920-2922

[9] CALCULATION OF TIME-DEPENDENCE IN THIN-FILMS [J].

LYBERATOS, A ;

CHANTRELL, RW ;

HOARE, A .

IEEE TRANSACTIONS ON MAGNETICS, 1990, 26 (01) :222-224

[10]

Neel L., 1949, ANN GEOPHYS, V5, P99, DOI DOI 10.1016/S0009-2509(00)00427-9

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