Magnetisation of isolated single crystalline fe-nanoparticles measured by a ballistic hall micro-magnetometer

L. Theil Kuhn; A. K. Geim; J. G S Lok; P. Hedegård; K. Ylänen; J. B. Jensen; E. Johnson; P. E. Lindelof

Magnetisation of isolated single crystalline fe-nanoparticles measured by a ballistic hall micro-magnetometer

L. Theil Kuhn, A. K. Geim, J. G S Lok, P. Hedegård, K. Ylänen, J. B. Jensen, E. Johnson, P. E. Lindelof

Research output: Contribution to journal › Article › peer-review

Abstract

We present here the first magnetisation measurements on isolated single crystalline Fenanoparticles performed with a ballistic Hall micro-magnetometer. The measurements have a sensitivity of 104μB and thus provide us the possibility to study the mechanisms of magnetisation reversal in a single nanoparticle. The magnetic properties of the nanoparticles are influenced by their crystal structure and shape, and the presence of an oxide surface layer. They exhibit curling of the magnetic moments, but also a novel hysteresis behaviour. The spin configurations found for the system agree well with numerical calculations based on a Heisenberg Hamiltonian including the exchange and dipole interaction and surface anisotropy.

Original language	English
Pages (from-to)	259-263
Number of pages	4
Journal	European Physical Journal D
Volume	10
Issue number	2
Publication status	Published - May 2000

Keywords

magnetization reversal
iron particles
model

Cite this

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title = "Magnetisation of isolated single crystalline fe-nanoparticles measured by a ballistic hall micro-magnetometer",

abstract = "We present here the first magnetisation measurements on isolated single crystalline Fenanoparticles performed with a ballistic Hall micro-magnetometer. The measurements have a sensitivity of 104μB and thus provide us the possibility to study the mechanisms of magnetisation reversal in a single nanoparticle. The magnetic properties of the nanoparticles are influenced by their crystal structure and shape, and the presence of an oxide surface layer. They exhibit curling of the magnetic moments, but also a novel hysteresis behaviour. The spin configurations found for the system agree well with numerical calculations based on a Heisenberg Hamiltonian including the exchange and dipole interaction and surface anisotropy.",

keywords = "magnetization reversal, iron particles, model",

author = "{Theil Kuhn}, L. and Geim, {A. K.} and Lok, {J. G S} and P. Hedeg{\aa}rd and K. Yl{\"a}nen and Jensen, {J. B.} and E. Johnson and Lindelof, {P. E.}",

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TY - JOUR

T1 - Magnetisation of isolated single crystalline fe-nanoparticles measured by a ballistic hall micro-magnetometer

AU - Theil Kuhn, L.

AU - Geim, A. K.

AU - Lok, J. G S

AU - Hedegård, P.

AU - Ylänen, K.

AU - Jensen, J. B.

AU - Johnson, E.

AU - Lindelof, P. E.

N1 - 321DU Times Cited:17 Cited References Count:18

PY - 2000/5

Y1 - 2000/5

N2 - We present here the first magnetisation measurements on isolated single crystalline Fenanoparticles performed with a ballistic Hall micro-magnetometer. The measurements have a sensitivity of 104μB and thus provide us the possibility to study the mechanisms of magnetisation reversal in a single nanoparticle. The magnetic properties of the nanoparticles are influenced by their crystal structure and shape, and the presence of an oxide surface layer. They exhibit curling of the magnetic moments, but also a novel hysteresis behaviour. The spin configurations found for the system agree well with numerical calculations based on a Heisenberg Hamiltonian including the exchange and dipole interaction and surface anisotropy.

AB - We present here the first magnetisation measurements on isolated single crystalline Fenanoparticles performed with a ballistic Hall micro-magnetometer. The measurements have a sensitivity of 104μB and thus provide us the possibility to study the mechanisms of magnetisation reversal in a single nanoparticle. The magnetic properties of the nanoparticles are influenced by their crystal structure and shape, and the presence of an oxide surface layer. They exhibit curling of the magnetic moments, but also a novel hysteresis behaviour. The spin configurations found for the system agree well with numerical calculations based on a Heisenberg Hamiltonian including the exchange and dipole interaction and surface anisotropy.

KW - magnetization reversal

KW - iron particles

KW - model

M3 - Article

VL - 10

SP - 259

EP - 263

JO - European Physical Journal D

JF - European Physical Journal D

IS - 2

ER -

Magnetisation of isolated single crystalline fe-nanoparticles measured by a ballistic hall micro-magnetometer

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