DocumentCode
787931
Title
Tailoring of the magnetic properties of SmCo5:Nb0.33Cr0.67 nanocomposites using mechanical alloying
Author
Schalek, Richard L. ; Leslie-Pelecky, Diandra L. ; Knight, John ; Sellmyer, D.J. ; Axtell, Steven C.
Author_Institution
Center for Mater. Res. & Anal., Nebraska Univ., Lincoln, NE, USA
Volume
31
Issue
6
fYear
1995
fDate
11/1/1995 12:00:00 AM
Firstpage
3772
Lastpage
3774
Abstract
Nanocomposite structures composed of ferromagnetic particles dispersed in a matrix are systems in which the magnetic properties can be tailored by varying the size and spacing of the ferromagnetic particles. Nanocomposites of SmCo5 in a non-magnetic Nb0.33Cr0.67 matrix exhibit a wide variety of magnetic properties. SmCo5 powder is premilled prior to mechanical alloying. The premilling results in a maximum coercivity of 16 kOe after 2 hours of milling, and an enhanced remanence ratio. Both features may be due to exchange anisotropy and/or exchange coupling between hard and soft ferromagnetic phases. The nanocomposite samples show that, when the SmCo5 particulates are small enough, the primary effect of alloying is to disperse them throughout the matrix with no further refinement of size
Keywords
chromium alloys; cobalt alloys; coercive force; composite materials; exchange interactions (electron); ferromagnetic materials; magnetic anisotropy; magnetic particles; mechanical alloying; nanostructured materials; niobium alloys; remanence; samarium alloys; Nb0.33Cr0.67; SmCo5; SmCo5-Nb0.33Cr0.67; SmCo5:Nb0.33Cr0.67 nanocomposites; coercivity; dispersed ferromagnetic particles; exchange anisotropy; exchange coupling; hard phases; magnetic properties; mechanical alloying; nonmagnetic matrix; powder premilling; remanence; soft phases; Alloying; Anisotropic magnetoresistance; Chromium; Coercive force; Magnetic properties; Milling; Nanostructures; Niobium; Powders; Remanence;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.489767
Filename
489767
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