Temperature dependence of coercivity and magnetic reversal in SmCo{sub x} thin films

Journal Article · Sun May 15 04:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1852215· OSTI ID:20711618

Andreescu, R; O'Shea, M J ^[1]

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1. Cardwell Hall, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2601 (United States)

Sm-Co magnets are prepared by sputter deposition with composition SmCo{sub x}, x=5-12.3. A dependence of magnetization, coercivity, and energy product on the thickness for SmCo{sub 5} is found. The thickest samples have the largest values of each of these properties. Increasing the Co content leads to a two-phase system with hard Sm-Co and soft Co phases that are strongly exchange coupled. Large energy products are obtained (up to 17 MG Oe at 400 K and 19 MG Oe at 300 K). The temperature dependence of the coercivity indicates that domain walls are pinned at narrow pin sites.

• OSTI ID: 20711618
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 97; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT
COBALT ALLOYS
COERCIVE FORCE
DEPOSITION
FERROMAGNETIC MATERIALS
MAGNETIZATION
PERMANENT MAGNETS
SAMARIUM ALLOYS
TEMPERATURE DEPENDENCE
THICKNESS
THIN FILMS