Mossbauer spectroscopy study of Fe-57 in R3Fe29-xTx (R=Y, Ce, Nd, Sm, Gd, Tb and Dy; T=V and Cr)

Fe-57 Mossbauer spectra for the Fe atoms in the R3Fe29-xTx (R=Y, Ce, Nd, Sm, Gd, Tb, Dy; T=V, Cr) compounds were collected at 4.2 K. The analysis of Mossbauer spectra was based on the results of magnetization and neutron powder diffraction measurements. The average Fe magnetic moments at 4.2 K, deduced from our data, are in accord with magnetization measurements. The average hyperfine field of Tb3Fe29-xCrx (x=1.0, 1.5, 2.0, and 3.0) decreases with increasing Cr concentration, which is also in accordance with the variation of the average Fe magnetic moment in the Tb3Fe29-xCrx compounds.

Fe-57 Mossbauer spectra for the Fe atoms in the R3Fe29-xTx (R=Y, Ce, Nd, Sm, Gd, Tb, Dy; T=V, Cr) compounds were collected at 4.2 K. The analysis of Mossbauer spectra was based on the results of magnetization and neutron powder diffraction measurements. The average Fe magnetic moments at 4.2 K, deduced from our data, are in accord with magnetization measurements. The average hyperfine field of Tb3Fe29-xCrx (x=1.0, 1.5, 2.0, and 3.0) decreases with increasing Cr concentration, which is also in accordance with the variation of the average Fe magnetic moment in the Tb3Fe29-xCrx compounds.

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Fundacao Amparo Pesquisa Estado Sao Paulo.; Conselho Nacl Desenvolvimento Cient & Tecnologico.; Coordenadoria Aperfeicoamento Pessoal Nivel Super.; Universidad Sao Paulo, Pro Reitoria Pesquisa.; Centro Latino Americano Fis.; Int Ctr Theoret Phys.; Int Union Crystallog.; CGA Analit.

Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil; Univ Sao Paulo, Inst Fis, BR-05316970 Sao Paulo, Brazil; Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China

Fundacao Amparo Pesquisa Estado Sao Paulo.; Conselho Nacl Desenvolvimento Cient & Tecnologico.; Coordenadoria Aperfeicoamento Pessoal Nivel Super.; Universidad Sao Paulo, Pro Reitoria Pesquisa.; Centro Latino Americano Fis.; Int Ctr Theoret Phys.; Int Union Crystallog.; CGA Analit.