SUPERPARAMAGNETISM IN FINE PARTICLE DISPERSIONS

被引：46

作者：

WILLIAMS, HD

OGRADY, K

ELHILO, M

机构：

[1] YSGOL GWYDDOR PEIRIANNEG ELECTRONAIDD, GRWP YMCHWIL DEFNYDDIAU MAGNETAIDD, CPGC, BANGOR LL57 1UT, GWYNEDD, WALES

[2] UNIV KEELE, DEPT PHYS, KEELE ST5 5BG, STAFFS, ENGLAND

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 122卷 / 1-3期

关键词：

D O I：

10.1016/0304-8853(93)91056-D

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetisation curves of two ferrofluids have been measured in the temperature range 3.6-300 K. The measurements show superparamagnetic behaviour above the freezing points of the fluids as demonstrated by the superposition of magnetization curves measured at different temperatures when plotted versus H/T. In the solid, however, superposition is not observed since anisotropy barriers are presented. A theory describing this behaviour is presented.

引用

页码：129 / 133

页数：5

共 20 条

[1] MAGNETIZATION PROCESSES AND FINE PARTICLES - TEMPERATURE DEPENDENCE OF SPONTANEOUS MAGNETIZATION IN SUPERPARAMAGNETIC NICKEL [J].

ABELEDO, CRS ;

SELWOOD, PW .

JOURNAL OF APPLIED PHYSICS, 1961, 32 (03) :S229-&

[2] SUPERPARAMAGNETISM AND EXCHANGE ANISOTROPY IN MICROPARTICLES OF MAGNETITE EMBEDDED IN AN INERT CARBONACEOUS MATRIX [J].

AHARONI, SM ;

LITT, MH .

JOURNAL OF APPLIED PHYSICS, 1971, 42 (01) :352-&

[3] MAGNETIC AND THERMAL-BEHAVIOR OF GAMMA-FE2O3 FINE GRAINS [J].

BACRI, JC ;

PERZYNSKI, R ;

SALIN, D .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 71 (03) :246-254

[4]

Bean C.P., 1959, J APPL PHYS, V30, pS120, DOI DOI 10.1063/1.2185850

[5]

BEAN CP, 1956, J APPL PHYS, V27, P148

[6]

BECKER JJ, 1957, T AM I MIN MET ENG, V209, P59

[7] MEASUREMENTS OF PARTICLE-SIZE DISTRIBUTION PARAMETERS IN FERROFLUIDS [J].

CHANTRELL, RW ;

POPPLEWELL, J ;

CHARLES, SW .

IEEE TRANSACTIONS ON MAGNETICS, 1978, 14 (05) :975-977

[8]

CHANTRELL RW, 1977, THESIS UCNW BANGOR, P61

[9] COMPONENTS OF MAGNETIZATION OF A FINE PARTICLE SYSTEM [J].

ELHILO, M ;

OGRADY, K .

IEEE TRANSACTIONS ON MAGNETICS, 1990, 26 (05) :1807-1809

[10]

Frenkel Y.I., 1955, KINETIC THEORY LIQUI

← 1 2 →