Preparation of oxygen excess SrLaFeO4+δ and its electrical and magnetic properties

T. Omata; K. Ueda; N. Ueda; M. Katada; S. Fujitsu; T. Hashimoto; H. Kawazoe

doi:10.1016/0038-1098(93)90882-N

Preparation of oxygen excess SrLaFeO_4+δ and its electrical and magnetic properties

T. Omata, K. Ueda, N. Ueda, M. Katada, S. Fujitsu, T. Hashimoto, H. Kawazoe

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Oxygen excess SrLaFeO_4+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 SrLaFeO_4+δ. We discussed the characteristics of the positive holes introduced by excess oxygens and the effects of the holes on resistivities.

Original language	English
Pages (from-to)	807-811
Number of pages	5
Journal	Solid State Communications
Volume	88
Issue number	10
DOIs	https://doi.org/10.1016/0038-1098(93)90882-N
Publication status	Published - 1993 Dec
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "Preparation of oxygen excess SrLaFeO4+δ and its electrical and magnetic properties",

abstract = "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 N{\'e}el temperature decreased from 355 K for the N2-annealed sample to 334 K for the sample annealed under oxygen pressure of 20 bar. 57Fe M{\"o}ssbauer 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.",

author = "T. Omata and K. Ueda and N. Ueda and M. Katada and S. Fujitsu and T. Hashimoto and H. Kawazoe",

year = "1993",

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journal = "Solid State Communications",

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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.

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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