Magnetic Instability of Ultrathin fcc Fe{sub {ital x}} Ni{sub 1{minus}{ital x }} Films

Journal Article · Mon Dec 01 00:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.5166· OSTI ID:554417

Schumann, F O; Willis, R F ^[1]; Goodman, K G; Tobin, J G ^[2]

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1. The Pennsylvania State University, Department of Physics, 104 Davey Lab, University Park, Pennsylvania 16802 (United States)
2. Department of Chemistry and Material Science, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

The {open_quotes}invar effect{close_quotes} in Fe{sub x}Ni {sub 1{minus}x} alloys occurs when the Fe content approaches 65{percent}. At this point, the magnetization falls to zero, and a martensitic structural transformation from a fcc to a bcc lattice occurs. This paper addresses the question: {open_quotes}What happens if the structural transformation is suppressed in an ultrathin alloy film?{close_quotes} We present results to this effect, showing the variation of the magnetization with changing composition in ultrathin films grown on Cu(100). We find a new low-spin, ferromagnetic phase of matter, which is a sensitive function of the atomic volume. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 554417
• Journal Information: Physical Review Letters, Vol. 79, Issue 25; Other Information: PBD: Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON ALLOYS
MAGNETIZATION
NICKEL ALLOYS
THIN FILMS
FCC LATTICES
PHASE TRANSFORMATIONS
BCC LATTICES
CHEMICAL COMPOSITION
PHOTOEMISSION
MAGNETIC CIRCULAR DICHROISM