한국자기학회

Retrieve | Search

Issues

Current Issue(Vol.21,No.4)

Volume 21(2016)

· No.1(pp.1-158) XML

· No.2(pp.159-302) XML

· No.3(pp.303-475) XML

· No.4(pp.476-665) XML

Volume 20(2015)

· No.1(pp.1-96) XML

· No.2(pp.92-200) XML

· No.3(pp.201-329) XML

· No.4(pp.331-465) XML

Volume 19(2014)

· No.1(pp.1-100) XML

· No.2(pp101-204) XML

· No.3(pp.205-313) XML

· No.4(pp.315-417) XML

Volume 18(2013)

· No. 1(pp1-79) XML

· No. 2(pp81-219) XML

· No. 3(pp221-374) XML

· No. 4(pp375-493) XML

Volume 17(2012)

· No.1(pp1-71) XML

· No.2(pp73-162) XML

· No.3(pp163-232) XML

· No.4(pp233-308) XML

Volume 16 (2011)

· No.1(pp1-82) XML

· No.2(pp83-195) XML

· No.3(pp197-321) XML

· No.4(pp323-465) XML

Volume 15 (2010)

· No.1(pp1-44) XML

· No.2(pp45-98) XML

· No.3(pp99-147) XML

· No.4(pp149-224) XML

Volume 14 (2009)

· No.1(pp.1-51)

· No.2(pp.53-100)

· No.3(pp.101-136)

· No.4(pp137-180) XML

Volume 13 (2008)

· No.1(pp.1-34)

· No.2(pp.37-80)

· No.3(pp.81-113)

· No.4(pp.115-181)

Volume 12 (2007)

· No.1(pp.1-52)

· No.2(pp.53-92)

· No.3(pp.93-132)

· No.4(pp.133-161)

Volume 11 (2006)

· No.1(pp.1-59)

· No.2(pp.61-102)

· No.3(pp.119-150)

· No.4(pp.151-207)

Volume 10 (2005)

· No.1(pp.1-39)

· No.2(pp.41-75)

· No.3(pp.77-132)

· No.4(pp.133-170)

Volume 9 (2004)

· No.1(pp.1-26)

· No.2(pp.27-68)

· No.3(pp.69-95)

· No.4(pp.97-127)

Volume 8 (2003)

· No.1(pp.1-78)

· No.2(pp.79-102)

· No.3(pp.103-127)

· No.4(pp.129-168)

Volume 7 (2002)

· No.1(pp.1-23)

· No.2(pp.25-59)

· No.3(pp.63-125)

· No.4(pp.127-164)

Volume 6 (2001)

· No.1(pp.1-41)

· No.2(pp.43-76)

· No.3(pp.77-107)

· No.4(pp.109-145)

Volume 5 (2000)

· No.1(pp.1-25)

· No.2(pp.27-71)

· No.3(pp.73-109)

· No.4(pp.111-143)

Volume 4 (1999)

· No.1(pp.1-37)

· No.2(pp.39-69)

· No.3(pp.73-106)

· No.4(pp.107-135)

Volume 3 (1998)

· No.1(pp.1-38)

· No.2(pp.35-66)

· No.3(pp.67-109)

· No.4(pp.111-156)

Volume 2 (1997)

· No.1(pp.1-33)

· No.2(pp.35-66)

· No.3(pp.67-109)

· No.4(pp.111-156)

Volume 1 (1996)

· No.1(pp.1-54)

· No.2(pp.55-100)

No.1(pp.1-38)

Home > Issues > Volume 3 (1998) > No.1(pp.1-38)

Thermal Behaviors of Nd2Fe14B/Fe3B Based Nanocomposite Magnets

Journal of Magnetics, Volume 3, Number 1, 31 Mar 1998, Pages 4-8

Choong-Jin Yang(Electromagnetic Materials Lab., Research Institute of Industrial Science & Technology), Eon-Byung Park(Electromagnetic Materials Lab., Research Institute of Industrial Science & Technology), Seung-Duck Choi(Electromagnetic Materials Lab., Research Institute of Industrial Science & Technology), Gao Youhui(Advanced Materials institute, Central Iron& Steel Research Institute), Zhu JingHan(Advanced Materials institute, Central Iron& Steel Research Institute)

Abstract

Two different compositions of melt spun magnetic alloys, Nd₄Fe₈₀B₁₆ and Nd₄Fe₇₆Co₃Hf_0.5Ga_0.5B₁₆ were characterized in terms of magnetic properties and thermal behaviors. It was found that the addition of Hf and Ga effectively slow down the crystallization rate of the nanocomposite Nd₂Fe₁₄B/Fe₃Bmagnet. Coercivity(_iH_c) changes only slightly with varying the post annealing conditions confirming that _iH_c is not a sensitive magnetic quantity as a function of grain size and exchange coupled interaction. The experimentally observed behaviors of M_r and H_c do not vary monotonously with in-creasing grain size which is not in agreement with the numerically calculated result near the critical grain size (d_c). The plot of the grain size dependence for the remanence and coercivity in isotrop!c nanocomposite magnets has been revised in this study. The maxium energy product, (B. H)_max=15.34 MGOe, and a reduced remanence, M_r/M_s=0.84 were obtained, respectively.

Keywords:

DOI:

Full Text: PDF

Copyright(c) 2009 The Korean Magnetics Society All rights reserved. E-mail : komag@unitel.co.kr