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Fabrication and Characterization of Iron-Cobalt Alloy Magnetic NanoclusterWires by Thermal DecompositionMethod inMagnetic Fields

Published online by Cambridge University Press:  15 February 2011

Heesung Moon ,
Changhun Nam ,
Changwook Kim ,
Bongsoo Kim  and
Gangho Lee
Heesung Moon
Affiliation:
Department of Chemistry and School of Molecular Science · BK21Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
Changhun Nam
Affiliation:
Department of Chemistry and School of Molecular Science · BK21Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
Changwook Kim
Affiliation:
Also with Technology division, Samsung SDI company, Limited, Suwon, 442-390, Korea.
Bongsoo Kim
Affiliation:
Department of Chemistry and School of Molecular Science · BK21Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
Gangho Lee
Affiliation:
Department of Chemistry, Kyungpook University, Daegu, Korea
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Abstract

We present one-step synthetic method of magnetic alloy nanocluster wires. This process is simple, less expensive, and saves time. The gas is vaporized in a vacuum chamber from a solution of dicobalt octacarbonyl (Co2(CO)8) and iron pentacarbonyl (Fe(CO)5) mixture, and thermally decomposed by using a nichrome wire. The silicon substrate is placed in a homogeneous magnetic field which is produced by two permanent magnets (4000 gauss), so that the nanowires easily grow in the direction of the magnetic flux. From X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM), we confirmed that these have a body-centered-cubic (BCC) structure with the magnetization easy axis of [110] direction, and a diameter in the range of 4 to 6 nm with a few micrometers in length. Also, we investigated that the squareness of the hysteresis loop is 61% for magnetic fields parallel to the wires and the coercivity along the easy axis is 670 oersteds by using vibrating scanning magnetometer (VSM).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 776: Symposium Q – Unconventional Approaches to Nanostructures with Applications in Electronics, Photonics, Information Storage and Sensing , 2003 , Q8.4
Copyright
Copyright © Materials Research Society 2003

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