Effects of Band Filling on Magnetic Structures: The Case of RNi{sub 2}Ge{sub 2}

Journal Article · Fri Oct 01 00:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.2817· OSTI ID:692533

Islam, Z; Detlefs, C; Song, C; Goldman, A I; Antropov, V; Harmon, B N; Bud`ko, S L; Wiener, T; Canfield, P C ^[1]; Wermeille, D ^[2]; Finkelstein, K D ^[3]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
2. Liquid Crystal Institute, Kent State University, Kent, Ohio 44242 (United States)
3. Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853 (United States)

We establish that strong Fermi surface nesting drives the N{acute e}el transition in the RNi{sub 2}Ge {sub 2} compounds. Generalized susceptibility, {chi}{sub 0}({bold q}) , calculations found nesting to be responsible for both {ital incommensurate} wave vector, (0 0 0.793) , in GdNi{sub 2}Ge {sub 2} , and the {ital commensurate} structure, (0 0 1) , in EuNi{sub 2}Ge {sub 2} , as revealed by x-ray resonant exchange scattering. A continuous transition from incommensurate to commensurate magnetic structures via band filling is predicted. The surprisingly higher T{sub N} in EuNi{sub 2}Ge {sub 2} than that in GdNi{sub 2}Ge {sub 2} is also explained. {copyright} {ital 1999} {ital The American Physical Society }

• OSTI ID: 692533
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRONIC STRUCTURE
EUROPIUM ALLOYS
FERMI LEVEL
GADOLINIUM ALLOYS
GERMANIUM ALLOYS
INTERMETALLIC COMPOUNDS
MAGNETIC SUSCEPTIBILITY
NEEL TEMPERATURE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
X-RAY DIFFRACTION