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    National Tsing Hua University Institutional Repository > 原子科學院  > 工程與系統科學系 > 期刊論文 >  Neutron Depolarization Study on the Magnetic Correlation Lengths of Nickel Ferrite with Different Packing Densities

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47611

    Title: Neutron Depolarization Study on the Magnetic Correlation Lengths of Nickel Ferrite with Different Packing Densities
    Authors: C.H.Lee;H.-H. Chang;H.C. Su;Y.H.Wu;C.W. Hu;L. J.Chang;A. Ioffe;K.Bussmann;Th. Brückel
    教師: 李志浩
    Date: 2009
    Publisher: North-Holland
    Relation: Physica B: Condensed Matter,Volume 404, Issue 17, 1 September 2009, Pages 2565-2567
    Keywords: Polarized neutrons
    Magnetic domain
    Statistical error
    Polarization ratio
    Abstract: The magnetic correlation length of a mixed nickel ferrite powder was studied by a newly commissioned depolarized neutron beamline at the W3 port of Tsing Hua Open Pool Reactor (THOR). In this work, Ni ferrite powder samples with different packing densities were studied. The magnetic correlation lengths of the sample were observed to be 2 μm at virgin state and about 3.1 μm at remanent state from the packing density of 20–60%. This magnetic domain size is smaller than particle size. No significant change of domain size at this packing density implies the domain wall motion is hindered by the porosity effectively up to at least 60% of packing density.
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47611
    Appears in Collections:[工程與系統科學系] 期刊論文

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