TY - JOUR
T1 - Mössbauer spectroscopy of 57Fe in high Tc superconductors YBa2Fe3xCu3(1-x)O7-δ
AU - Bauminger, E. R.
AU - Kowitt, M.
AU - Felner, I.
AU - Nowik, I.
PY - 1988/1
Y1 - 1988/1
N2 - Mossbauer spectroscopy of 57Fe in both tetragonal and othorhombic phases of YBa2(FexCu1-x)3O7-δ, with x = 0.01, 0.02 and 0.10, at temperatures 4.2 K, 75 K, 90 K, and 300 K have been performed. In all samples three major subspectra corresponding to iron in different local environments are observed. It is concluded that Fe substitutes mainly Cul. At 4.2 K, samples with x=0.01 in the "quenched" tetragonal phase exhibit magnetic hyperfine structure, due to slow spin relaxation rates, whereas in the orthorhombic superconducting phase, only samples with x=0.1 exhibit magnetic hyperfine structure, in this case probably due to spin glass magnetic order.
AB - Mossbauer spectroscopy of 57Fe in both tetragonal and othorhombic phases of YBa2(FexCu1-x)3O7-δ, with x = 0.01, 0.02 and 0.10, at temperatures 4.2 K, 75 K, 90 K, and 300 K have been performed. In all samples three major subspectra corresponding to iron in different local environments are observed. It is concluded that Fe substitutes mainly Cul. At 4.2 K, samples with x=0.01 in the "quenched" tetragonal phase exhibit magnetic hyperfine structure, due to slow spin relaxation rates, whereas in the orthorhombic superconducting phase, only samples with x=0.1 exhibit magnetic hyperfine structure, in this case probably due to spin glass magnetic order.
UR - http://www.scopus.com/inward/record.url?scp=0023844082&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(88)90671-0
DO - 10.1016/0038-1098(88)90671-0
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AN - SCOPUS:0023844082
SN - 0038-1098
VL - 65
SP - 123
EP - 127
JO - Solid State Communications
JF - Solid State Communications
IS - 2
ER -