Exchange interactions in Dy{sub x}Tm{sub 1{minus}x}Fe{sub 10}Si{sub 2} compounds

Journal Article · Mon Feb 28 23:00:00 EST 1994 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.312371· OSTI ID:37276

Stefanski, P; Kowalczyk, A ^[1]; Budzynski, M ^[2]

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1. Polish Academy of Sciences, Poznan (Poland). Inst. of Molecular Physics
2. Maria Curie-Sklodowska Univ., Lublin (Poland). Physics Inst.

Moessbauer measurements were performed on Dy{sub x}Tm{sub 1{minus}x}Fe{sub 10}Si{sub 2} samples (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0). The hyperfine magnetic fields at {sup 57}Fe nuclei were investigated, their changes caused by replacement of Tm by Dy atoms. Measurements were performed in transmission geometry using a constant acceleration Moessbauer spectrometer. The substitution of Tm atoms by the Dy atoms causes an increase of internal magnetic fields. In pure TmFe{sub 10}Si{sub 2} the hyperfine magnetic fields at 8(i), 8(j) and 8(f) positions are respectively equal to 25.3, 23.0 and 21.2 T. The complete substitution of Tm by Dy gives the average increase of hyperfine magnetic field magnitude equal to 0.6 T. The molecular field approximation was applied to calculate the intra- and intersublattice exchange interactions considering experimental Curie temperatures of the investigated compounds. The calculated exchange coupling constants between rare earth and iron sublattices increase when substituting Tm by Dy.

• OSTI ID: 37276
• Report Number(s): CONF-930860--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 2Pt2 Vol. 30; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
CRYSTAL STRUCTURE
CURIE POINT
DYSPROSIUM ALLOYS
EXPERIMENTAL DATA
INTERMETALLIC COMPOUNDS
IRON 57
IRON BASE ALLOYS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
SILICON ALLOYS
THULIUM ALLOYS