Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

Bertram Schleicher; Unto Tapper; Esko Kauppinen; M. Martin; L. Roschier; M. Paalanen; W. Wernsdorfer; A. Benoit

doi:10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

Bertram Schleicher, Unto Tapper, Esko Kauppinen, M. Martin, L. Roschier, M. Paalanen, W. Wernsdorfer, A. Benoit

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

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Abstract

We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID.
The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly.
If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.

Original language	English
Pages (from-to)	315-320
Journal	Applied Organometallic Chemistry
Volume	12
Issue number	5
DOIs	https://doi.org/10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6
Publication status	Published - 1998
MoE publication type	A1 Journal article-refereed
Event	Nanoporous Materials and Magnetic Properties of Nanostructured Materials: Organized by the ECNM - Frascati, Italy Duration: 19 Sept 1997 → 20 Sept 1997

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10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

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@article{3787a6fd2aff41689c05047fa604fadd,

title = "Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route",

abstract = "We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.",

author = "Bertram Schleicher and Unto Tapper and Esko Kauppinen and M. Martin and L. Roschier and M. Paalanen and W. Wernsdorfer and A. Benoit",

year = "1998",

doi = "10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6",

language = "English",

volume = "12",

pages = "315--320",

journal = "Applied Organometallic Chemistry",

issn = "0268-2605",

publisher = "Wiley",

number = "5",

note = "Nanoporous Materials and Magnetic Properties of Nanostructured Materials : Organized by the ECNM ; Conference date: 19-09-1997 Through 20-09-1997",

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TY - JOUR

T1 - Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

AU - Schleicher, Bertram

AU - Tapper, Unto

AU - Kauppinen, Esko

AU - Martin, M.

AU - Roschier, L.

AU - Paalanen, M.

AU - Wernsdorfer, W.

AU - Benoit, A.

PY - 1998

Y1 - 1998

N2 - We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.

AB - We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal.

U2 - 10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

DO - 10.1002/(SICI)1099-0739(199805)12:5<315::AID-AOC723>3.0.CO;2-6

M3 - Article

SN - 0268-2605

VL - 12

SP - 315

EP - 320

JO - Applied Organometallic Chemistry

JF - Applied Organometallic Chemistry

IS - 5

T2 - Nanoporous Materials and Magnetic Properties of Nanostructured Materials

Y2 - 19 September 1997 through 20 September 1997

ER -

Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route

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