SmCo based sputtered films with CaCu{sub 5} and TbCu{sub 7} structures

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364624· OSTI ID:496612

Rani, R; Cadieu, F J ^[1]; Qian, X R ^[2]; Mendoza, W A; Shaheen, S A ^[3]

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1. MARTECH, Florida State University, Tallahassee, Florida 32306 and Physics Department, Queens College of CUNY, Flushing, New York 11367 (United States)
2. Physics Department, Queens College of CUNY, Flushing, New York 11367 (United States)
3. MARTECH and Physics Department, Florida State University, Tallahassee, Florida 32306 (United States)

SmCo based films containing 20 at.{percent} Fe and with Sm varying from 15.5 to 17 at.{percent} have been synthesized to show the transition from ordered CaCu{sub 5} to disordered TbCu{sub 7} phase. For either phase, the demagnetization energy present during deposition can result in films with the crystallite c axes randomly splayed onto the film plane. It has been possible to synthesize the high anisotropy CaCu{sub 5} phase with either a (200) or (110) texture by adjusting the sputtering parameters to correspond to either a relatively high or relatively low surface mobility during the film deposition. It has been possible to synthesize ordered CaCu{sub 5} type films with very low values of B{sub R}({perpendicular})/B{sub R}({parallel})=0.042. Previously, SmCo based single phase TbCu{sub 7} structure films have been synthesized with close to the usual high energy product 2{endash}17 compositions of nominally 7 at.{percent} Cu and 2 at.{percent} Zr. The films have been characterized by vibrating-sample magnetometer and superconducting quantum interference device magnetometry, x-ray diffraction, and scanning electron microscope measurements for composition and film morphology. The films have been directly crystallized onto heated substrates so that the crystallite c axes are predominantly randomly aligned in the film plane. The crystal structures observed could be switched from the ordered CaCu{sub 5} to the disordered TbCu{sub 7} phase for small variations in the Sm concentrations. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 496612
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
DEMAGNETIZATION
FERROMAGNETIC MATERIALS
IRON ALLOYS
MAGNETIC PROPERTIES
ORDER-DISORDER TRANSFORMATIONS
PERMANENT MAGNETS
SAMARIUM ALLOYS
SCANNING ELECTRON MICROSCOPY
SPUTTERING
SYNTHESIS
TEXTURE
THIN FILMS
ZIRCONIUM ALLOYS