TY - JOUR
T1 - Preparation of oxygen excess SrLaFeO4+δ and its electrical and magnetic properties
AU - Omata, T.
AU - Ueda, K.
AU - Ueda, N.
AU - Katada, M.
AU - Fujitsu, S.
AU - Hashimoto, T.
AU - Kawazoe, H.
N1 - Funding Information:
Acknowledgements -- This work was done partly by using the experimental facilities of Center for Ceramics Research, Tokyo Institute of Technology.
PY - 1993/12
Y1 - 1993/12
N2 - Oxygen excess SrLaFeO4+δ was prepared and the electrical and magnetic properties were measured. Electrical resistivities at room temperature were 3 × 103 and 5 × 101 Ω-cm for the N2-annealed sample and the sample annealed under oxygen pressure of 20 bar, respectively. The antiferromagnetic Néel temperature decreased from 355 K for the N2-annealed sample to 334 K for the sample annealed under oxygen pressure of 20 bar. 57Fe Mössbauer spectra showed that iron is in the high spin and trivalent state even in the strongly oxidized SrLaFeO4+δ. We discussed the characteristics of the positive holes introduced by excess oxygens and the effects of the holes on resistivities.
AB - Oxygen excess SrLaFeO4+δ was prepared and the electrical and magnetic properties were measured. Electrical resistivities at room temperature were 3 × 103 and 5 × 101 Ω-cm for the N2-annealed sample and the sample annealed under oxygen pressure of 20 bar, respectively. The antiferromagnetic Néel temperature decreased from 355 K for the N2-annealed sample to 334 K for the sample annealed under oxygen pressure of 20 bar. 57Fe Mössbauer spectra showed that iron is in the high spin and trivalent state even in the strongly oxidized SrLaFeO4+δ. We discussed the characteristics of the positive holes introduced by excess oxygens and the effects of the holes on resistivities.
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U2 - 10.1016/0038-1098(93)90882-N
DO - 10.1016/0038-1098(93)90882-N
M3 - Article
AN - SCOPUS:0027808702
VL - 88
SP - 807
EP - 811
JO - Solid State Communications
JF - Solid State Communications
SN - 0038-1098
IS - 10
ER -