Spin-glass behavior in an interacting γ-Fe2O3 nanoparticle system

被引：140

作者：

Parker, D. ^{[1
]}

Dupuis, V. ^{[2
]}

Ladieu, F. ^{[1
]}

Bouchaud, J. -P. ^{[1
]}

Dubois, E. ^{[2
]}

Perzynski, R. ^{[2
]}

Vincent, E. ^{[1
]}

机构：

[1] CEA, Serv Phys Etat Condense, CNRS, URA 2464,DSM DRECAM, F-91191 Gif Sur Yvette, France

[2] Univ Paris 06, CNRS, UMR 7612, LI2C,ESPCI, F-75252 Paris, France

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.77.104428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the superspin-glass behavior of a concentrated assembly of interacting maghemite nanoparticles and compare it to that of canonical atomic spin-glass systems. ac versus temperature and frequency measurements show evidence of a superspin-glass transition taking place at low temperature. In order to fully characterize the superspin-glass phase, the aging behavior of both the thermoremanent magnetization and ac susceptibility has been investigated. It is shown that the scaling laws obeyed by superspin glasses and atomic spin glasses are essentially the same after subtraction of a superparamagnetic contribution from the superspin-glass response functions. Finally, we discuss a possible origin of this superparamagnetic contribution in terms of dilute spin-glass models.

引用

页数：9

共 42 条

[1] MAGNETIC COLLOIDAL PROPERTIES OF IONIC FERROFLUIDS
BACRI, JC
PERZYNSKI, R
SALIN, D
CABUIL, V
MASSART, R
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1986, 62 (01) : 36 - 46
[2] BARTOLOME J, 2007, J MAGN MAGN MATER, V316, P9
[3] Finite-size effects in fine particles: magnetic and transport properties
Batlle, X
Labarta, A
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2002, 35 (06) : R15 - R42
[4] Berkovski B., 1996, MAGNETIC FLUIDS APPL
[5] Spin anisotropy and slow dynamics in spin glasses
Bert, F
Dupuis, V
Vincent, E
Hammann, J
Bouchaud, JP
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (16) : 167203 - 1
[6] MAGNETIC ORDERING IN GOLD-IRON ALLOYS
CANNELLA, V
MYDOSH, JA
[J]. PHYSICAL REVIEW B-SOLID STATE, 1972, 6 (11): : 4220 - +
[7] MEAN FIELD-THEORY OF DILUTE SPIN-GLASSES WITH POWER-LAW INTERACTIONS
CIZEAU, P
BOUCHAUD, JP
[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1993, 26 (05): : L187 - L193
[8] Modern magnetic materials in data storage
Comstock, RL
[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2002, 13 (09) : 509 - 523
[9] Critical spin-glass dynamics in a heterogeneous nanogranular system
De Toro, JA
de la Torre, MAL
Riveiro, JM
Beesley, A
Goff, JP
Thomas, MF
[J]. PHYSICAL REVIEW B, 2004, 69 (22) : 224407 - 1
[10] Del Bianco L, 2005, NAN SCI TEC, P217

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