The oxygen dependence of the magnetic structure for Sr3Fe2O7-δ

K. Mori; T. Kamiyama; H. Kobayashi; T. Arima; Kenji Ohoyama; S. Ikeda

doi:10.1007/s003390201373

The oxygen dependence of the magnetic structure for Sr₃Fe₂O_7-δ

K. Mori, T. Kamiyama, H. Kobayashi, T. Arima, Kenji Ohoyama, S. Ikeda

Institute for Materials Research (IMR)

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

6 Citations (Scopus)

Abstract

We have measured the magnetization of single crystalline Sr₃Fe₂O_6.5 with a lot of oxygen deficiencies. It was observed that the spin direction is parallel to the c-axis below T_N. Moreover, we carried out neutron powder diffraction experiments with a Sr₃Fe₂O_6.21 powder sample. The magnetic structure with a lot of oxygen deficiencies (δ > 0.5) has a typical Ising antiferromagnet system with the magnetic unit cell √2a × √2a × c. On the other hand, it was found that the magnetic structure of Sr₃Fe₂O_6.94 with a few oxygen deficiencies is larger than that of 2a × 2a × 4c. The magnetic structure of Sr₃Fe₂O_6.94 is obviously different from that of Sr₃Fe₂O_7-δ (δ > 0.5). Such a difference in the magnetic structures is associated with a drastic change of the exchange interactions between Fe-spins due to the introduction of oxygen.

Original language	English
Journal	Applied Physics A: Materials Science and Processing
Volume	74
Issue number	SUPPL.I
DOIs	https://doi.org/10.1007/s003390201373
Publication status	Published - 2002 Dec 1

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

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title = "The oxygen dependence of the magnetic structure for Sr3Fe2O7-δ",

abstract = "We have measured the magnetization of single crystalline Sr3Fe2O6.5 with a lot of oxygen deficiencies. It was observed that the spin direction is parallel to the c-axis below TN. Moreover, we carried out neutron powder diffraction experiments with a Sr3Fe2O6.21 powder sample. The magnetic structure with a lot of oxygen deficiencies (δ > 0.5) has a typical Ising antiferromagnet system with the magnetic unit cell √2a × √2a × c. On the other hand, it was found that the magnetic structure of Sr3Fe2O6.94 with a few oxygen deficiencies is larger than that of 2a × 2a × 4c. The magnetic structure of Sr3Fe2O6.94 is obviously different from that of Sr3Fe2O7-δ (δ > 0.5). Such a difference in the magnetic structures is associated with a drastic change of the exchange interactions between Fe-spins due to the introduction of oxygen.",

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T1 - The oxygen dependence of the magnetic structure for Sr3Fe2O7-δ

AU - Mori, K.

AU - Kamiyama, T.

AU - Kobayashi, H.

AU - Arima, T.

AU - Ohoyama, Kenji

AU - Ikeda, S.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - We have measured the magnetization of single crystalline Sr3Fe2O6.5 with a lot of oxygen deficiencies. It was observed that the spin direction is parallel to the c-axis below TN. Moreover, we carried out neutron powder diffraction experiments with a Sr3Fe2O6.21 powder sample. The magnetic structure with a lot of oxygen deficiencies (δ > 0.5) has a typical Ising antiferromagnet system with the magnetic unit cell √2a × √2a × c. On the other hand, it was found that the magnetic structure of Sr3Fe2O6.94 with a few oxygen deficiencies is larger than that of 2a × 2a × 4c. The magnetic structure of Sr3Fe2O6.94 is obviously different from that of Sr3Fe2O7-δ (δ > 0.5). Such a difference in the magnetic structures is associated with a drastic change of the exchange interactions between Fe-spins due to the introduction of oxygen.

AB - We have measured the magnetization of single crystalline Sr3Fe2O6.5 with a lot of oxygen deficiencies. It was observed that the spin direction is parallel to the c-axis below TN. Moreover, we carried out neutron powder diffraction experiments with a Sr3Fe2O6.21 powder sample. The magnetic structure with a lot of oxygen deficiencies (δ > 0.5) has a typical Ising antiferromagnet system with the magnetic unit cell √2a × √2a × c. On the other hand, it was found that the magnetic structure of Sr3Fe2O6.94 with a few oxygen deficiencies is larger than that of 2a × 2a × 4c. The magnetic structure of Sr3Fe2O6.94 is obviously different from that of Sr3Fe2O7-δ (δ > 0.5). Such a difference in the magnetic structures is associated with a drastic change of the exchange interactions between Fe-spins due to the introduction of oxygen.

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The oxygen dependence of the magnetic structure for Sr₃Fe₂O_7-δ

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