[1] Materials Development Center, Technology & IP HQ, TDK Corporation, 570-2 Matsugasita, Narita, Minamihadori,268-8588, Japan
[2] Materials Analysis Section, Technology & IP HQ, TDK Corporation, 2-15-7, higashioowada, Ichikawa,272-8558, Japan
[3] Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology, 2266-98 Anagahora, Shimoshidami, Nagoya, Moriyama,463-8560, Japan