Ferrite magnetic material
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United States of America Patent
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Mar 1, 2016
Grant Date -
Jun 28, 2012
app pub date -
Jul 5, 2010
filing date -
Jul 8, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by Ca1-w-x-yRwSrxBayFezMmO19 (R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25
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