Temperature dependent magnetic characterisation of core/shell Fe80Rh20 nanoparticles

被引：7

作者：

Trunova, A. V. ^{[1
]}

Lindner, J. ^{[1
]}

Meckenstock, R. ^{[1
]}

Spasova, M. ^{[1
]}

Farle, M. ^{[1
]}

Ciuculescu, D. ^{[2
]}

Amiens, C. ^{[2
]}

Chaudret, B. ^{[2
]}

Respaud, M. ^{[3
]}

机构：

[1] Univ Duisburg Essen, Fachbereich Phys, Expt Phys AG Farle, D-47048 Duisburg, Germany

[2] Chim Coordinat Lab, F-31007 Toulouse 04, France

[3] INSA, LPCNO, F-31077 Toulouse 04, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 20期

关键词：

Nanoparticle; Ferromagnetic resonance; Anisotropy field; CORE;

D O I：

10.1016/j.jmmm.2009.06.083

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxide free core-shell Fe80Rh20 nanoparticles with an average diameter of about 2 nm were wet-chemically synthesised with two different morphologies: either with Rh-rich or an Fe-rich core. The magnetic properties of these nanoparticles were investigated between 5 and 290 K by ferromagnetic resonance and superconducting quantum interference device magnetometry. The magnetic anisotropy field varied by a factor of 2 in this temperature range. The nanoparticles with Rh-rich core were found to have a higher anisotropy field of B-A = 0.214T at 5 K as compared to the nanoparticles with Fe-rich core (B-A = 0.169 T). Multifrequency ferromagnetic resonance (4-24 GHz) was used to determine the g-factor. It was determined that the g-factor of nanoparticles with Fe-rich core is higher (g = 2.08) compared to nanoparticles with Rh-rich core g = 2.06, being close to the value for iron bulk. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3502 / 3506

页数：5

共 20 条

[1] Multifrequency magnetic resonance and blocking behavior of FexPt1-x nanoparticles [J].

Antoniak, C. ;

Lindner, J. ;

Salgueirino-Maceira, V. ;

Farle, M. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2006, 203 (11) :2968-2973

[2] Magnetic anisotropy and its temperature dependence in iron-rich FexPt1-x nanoparticles [J].

Antoniak, C ;

Lindner, J ;

Farle, M .

EUROPHYSICS LETTERS, 2005, 70 (02) :250-256

[3] Functionalisation of magnetic nanoparticles for applications in biomedicine [J].

Berry, CC ;

Curtis, ASG .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (13) :R198-R206

[4] One-pot synthesis of core - Shell FeRh nanoparticles [J].

Ciuculescu, Diana ;

Amiens, Catherine ;

Respaud, Marc ;

Falqui, Andrea ;

Lecante, Pierre ;

Benfield, Robert E. ;

Jiang, Linqin ;

Fauth, Kai ;

Chaudret, Bruno .

CHEMISTRY OF MATERIALS, 2007, 19 (19) :4624-4626

[5] Magnetic nanoparticles for biomedical heating applications [J].

Dutz, S ;

Hergt, R ;

Mürbe, J ;

Töpfer, J ;

Müller, R ;

Zeisberger, M ;

Andrä, W ;

Bellemann, ME .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 2006, 220 (02) :145-151

[6] Estimation of blocking temperatures from ZFC/FC curves [J].

Hansen, MF ;

Morup, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 203 :214-216

[7] ON THE THEORY OF FERROMAGNETIC RESONANCE ABSORPTION [J].

KITTEL, C .

PHYSICAL REVIEW, 1948, 73 (02) :155-161

[8] ON THE GYROMAGNETIC RATIO AND SPECTROSCOPIC SPLITTING FACTOR OF FERROMAGNETIC SUBSTANCES [J].

KITTEL, C .

PHYSICAL REVIEW, 1949, 76 (06) :743-748

[9] *FERROMAGNETIC RESONANCE [J].

KITTEL, C .

JOURNAL DE PHYSIQUE ET LE RADIUM, 1951, 12 (03) :291-302

[10] Synthesis and magnetic properties of self-organized FeRh nanoparticles [J].

Ko, Hnin Yu Yu ;

Suzuki, Takao .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (09)

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