TY - JOUR
T1 - Crystal structure magnetic properties and hyperfine interactions in RFe4Al8 (R = rare earth) systems
AU - Felner, I.
AU - Nowik, I.
PY - 1978
Y1 - 1978
N2 - X-ray, magnetic susceptibility and 57Fe, 151Eu, 155Gd and 170Yb Mössbauer studies were performed. Detailed analysis of X-ray intensities yields all ion locations and interatomic distances in the body centered tetragonal structure (space group I4/MMM). The unit cell contains two formula units. The rare earth, iron and aluminum occupy the 2(a), 8(f) and 8(i) and 8(j) crystallographic sites, respectively. The susceptibility and Mössbauer studies indicate the existence of two independent magnetic sublattices. The iron sublattice orders into an antiferromagnetic structure at about 120 K, whereas the rare earth sublattice orders (excluding those with La, Ce, Eu, Y and Lu) antiferromagnetically at about 20 K. The 57Fe, 151Eu, 155Gd and 170Yb Mössbauer studies yield, in addition to the hyperfine interaction parameters, also the direction along which the moments are aligned. In EuFe4Al8 the Eu ion is in a mixed valent state.
AB - X-ray, magnetic susceptibility and 57Fe, 151Eu, 155Gd and 170Yb Mössbauer studies were performed. Detailed analysis of X-ray intensities yields all ion locations and interatomic distances in the body centered tetragonal structure (space group I4/MMM). The unit cell contains two formula units. The rare earth, iron and aluminum occupy the 2(a), 8(f) and 8(i) and 8(j) crystallographic sites, respectively. The susceptibility and Mössbauer studies indicate the existence of two independent magnetic sublattices. The iron sublattice orders into an antiferromagnetic structure at about 120 K, whereas the rare earth sublattice orders (excluding those with La, Ce, Eu, Y and Lu) antiferromagnetically at about 20 K. The 57Fe, 151Eu, 155Gd and 170Yb Mössbauer studies yield, in addition to the hyperfine interaction parameters, also the direction along which the moments are aligned. In EuFe4Al8 the Eu ion is in a mixed valent state.
UR - http://www.scopus.com/inward/record.url?scp=0018154162&partnerID=8YFLogxK
U2 - 10.1016/0022-3697(78)90109-9
DO - 10.1016/0022-3697(78)90109-9
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AN - SCOPUS:0018154162
SN - 0022-3697
VL - 39
SP - 951
EP - 956
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 9
ER -