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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.9 (2002)  >  pp.2181-2184

MATERIALS TRANSACTIONS
<<Previous article Vol.43  No.9 (2002)   pp.2181 - 2184 Next article>>

Magnetic Properties of Ni-Mn Alloys with Dispersed Ferromagnetic Nanoparticles

Teiko Okazaki1), Yositaka Kumeta1) and Yasuo Sakisaka1)
1) Faculty of Science and Technology, Hirosaki Unversity

We investigated the magnetic properties of Ni1−xMnx (x=0.20–0.30) alloys with dispersed nanoparticles having a ferromagnetic Ni3Mn ordered phase, which is caused by suitable heat treatment. Magnetic analysis shows that for 0.3≥x>0.25 alloys interaction between 4–10 nm particles through Mn-rich matrix is antiferromagnetic. The Néel temperature increases with both Mn concentration and long-range-order parameter. On the contrary, for 0.25>x≥0.20 alloys, interaction between ∼ 4 nm particles through Ni-rich matrix is ferromagnetic. These alloys exhibit soft magnetic properties and have permeability of 400–600 for 1–500 kHz high frequency.


Keyword:
Ni1-xMnx (x=0.20-0.30) alloy, ferromagnetic ordered phase, nanoparticle, Néel temperature, soft magnetic property

Received: April 24, 2002
Accepted: July 04, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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