Structural and magnetic properties of RFe[sub 6]Ge[sub 6] (R = Y, Gd, Tb, Er)

Conference · Tue Nov 01 04:00:00 EST 1994 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6665591

Wang, Y B; Wiarda, D; Ryan, D H ^[1]; Cadogan, J M ^[2]

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1. McGill Univ., Montreal, Quebec (Canada)
2. Univ. of New South Wales, Sydney (Australia)

A series of RFe[sub 6]Ge[sub 6] (R = Y, Gd, Tb, Er) compounds have been prepared by arc-melting. Structural studies using x-ray diffraction (XRD) show that all four as-cast alloys belong to the hexagonal P6/mmm space group with similar lattice parameters (for YFe[sub 6]Ge[sub 6], a = 5.12[angstrom] and c = 4.07[angstrom]). After annealing at 900 C for two weeks, both YFe[sub 6]Ge[sub 6] and TbFe[sub 6]Ge[sub 6] transform into the orthorhombic Cmcm structure. Moessbauer spectroscopy and magnetization measurements show that all of the alloys are antiferromagnetically ordered at room temperature. The authors find a single Fe crystallographic site, consistent with the RFe[sub 6]Ge[sub 6] structures. Both the room temperature [sup 57]Fe hyperfine field and the Neel temperature (T[sub N]) are largely independent of the rare-earth, being 14.9(1) T and 487 K respectively for YFe[sub 6]Ge[sub 6].

• OSTI ID: 6665591
• Report Number(s): CONF-940629--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 30:6Pt1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
CRYSTAL STRUCTURE
DATA
ERBIUM ALLOYS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GADOLINIUM ALLOYS
GERMANIUM ALLOYS
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERMETALLIC COMPOUNDS
IRON 57
IRON ALLOYS
IRON ISOTOPES
ISOTOPES
MAGNETIC PROPERTIES
NUCLEI
NUMERICAL DATA
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
STABLE ISOTOPES
TERBIUM ALLOYS
YTTRIUM ALLOYS