Faraday rotation in magnetic gamma-Fe2O3/SiO2 nanocomposites

被引：52

作者：

Guerrero, H ^{[1
]}

Rosa, G ^{[1
]}

Morales, MP ^{[1
]}

delMonte, F ^{[1
]}

Moreno, EM ^{[1
]}

Levy, D ^{[1
]}

delReal, RP ^{[1
]}

Belenguer, T ^{[1
]}

Sema, CJ ^{[1
]}

机构：

[1] CSIC CANTOBLANCO,INST CIENCIA MAT MADRID,MADRID 28049,SPAIN

来源：

APPLIED PHYSICS LETTERS | 1997年 / 71卷 / 18期

关键词：

D O I：

10.1063/1.120181

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Faraday rotation spectrum has been measured at room temperature in a magnetic nanocomposite of gamma-Fe2O3/SiO2. The material consists of isolated gamma-Fe2O3 nanoparticles dispersed in a silica matrix, and it was prepared through a sol-gel method. The composite contains 18% of gamma-Fe2O3 in weight with an average particle size of 20 nm. It has a coercitivity of 30 Oe and an M-S of 6 emu/g. The specific Faraday rotation spectrum exhibits a narrow peak centered around 765 nm, reaching a value of 110 degrees/cm and an absorption coefficient of 64 cm(-1). Faraday rotation versus applied held has also been measured, and a cycle similar to the one described by the magnetization has been found. (C) 1997 American Institute of Physics. [S0003-6951(97)02444-3].

引用

页码：2698 / 2700

页数：3

共 19 条

[1]

Awschalom D.D., 1995, PHYS TODAY, V43

[2]

Bean C. P., 1959, J APPL PHYS, V30, p120s, DOI [10.1063/1.2185850, DOI 10.1063/1.2185850]

[3] Relations between magneto-optical properties and reactivity in cobalt-manganese ferrite thin films and powders [J].

Bouet, L ;

Tailhades, P ;

Rousset, A .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 153 (03) :389-396

[4]

CHEN D, 1971, HDB LASERS, P460

[5] CEMS AND FARADAY-ROTATION STUDY OF GAMMA-FE2O3-FE3O4 FILMS OBTAINED BY A NEW PYROLISIS TECHNIQUE [J].

CUSIDO, JA ;

OBRADORS, X ;

FONTCUBERTA, J ;

ISALGUE, A ;

CANAL, F ;

CORTADELLAS, J ;

LANGLET, M ;

JOUBERT, JC .

IEEE TRANSACTIONS ON MAGNETICS, 1987, 23 (01) :74-76

[6]

Day G. W., 1988, PROC SPIE, V985, P138

[7] Formation of gamma-Fe2O3 isolated nanoparticles in a silica matrix [J].

delMonte, F ;

Morales, MP ;

Levy, D ;

Fernandez, A ;

Ocana, M ;

Roig, A ;

Molins, E ;

OGrady, K ;

Serna, CJ .

LANGMUIR, 1997, 13 (14) :3627-3634

[8]

GERBER R, 1994, NATO ASI SER E, V253

[9] Nanostructured materials: State of the art and perspectives [J].

Gleiter, H .

NANOSTRUCTURED MATERIALS, 1995, 6 (1-4) :3-14

[10] POLYCRYSTALLINE MATERIALS FOR MAGNETOOPTICAL DEVICES [J].

GUERRERO, H ;

ESCUDERO, JL ;

BERNABEU, E .

OPTICS LETTERS, 1992, 17 (10) :760-762

← 1 2 →