A μSR study of high oxidation state iron oxides displaying large magnetoresistance

I M Marshall, S J Blundell, A Husmann, T Jestädt, Brendon W Lovett, F L Pratt, J Lago, P D Battle, M J Rosseinsky

Research output: Contribution to journalArticle

Abstract

The magnetic and conducting properties of many transition metal oxides may be drastically altered by doping. This study concerns a family of compounds with compositions intermediate between the itinerant helical antiferromagnet SrFeO3 and the ferromagnetic metal SrCoO3. We have measured the temperature-dependent muon-spin relaxation in five compounds in the family SrFe1-xCoxO3 where Co substitution varies from x = 0 to 0.2 and investigated the relation between the relaxation rate and the magnetic susceptibility above the ordering temperature. These materials show large magnetoresistance which may be associated with the presence of competing interactions and non-equilibrium behaviour due to cluster formation. We find a quasistatic local field at the muon site below the magnetic transition temperature indicative of magnetic order in samples with x = 0.15 and 0.2 but not in the sample with x = 0. (C) 2000 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)89-93
Number of pages5
JournalPhysica B: Condensed Matter
Volume289-290
DOIs
Publication statusPublished - Aug 2000

Cite this

Marshall, I. M., Blundell, S. J., Husmann, A., Jestädt, T., Lovett, B. W., Pratt, F. L., ... Rosseinsky, M. J. (2000). A μSR study of high oxidation state iron oxides displaying large magnetoresistance. Physica B: Condensed Matter, 289-290, 89-93. https://doi.org/10.1016/S0921-4526(00)00269-6
Marshall, I M ; Blundell, S J ; Husmann, A ; Jestädt, T ; Lovett, Brendon W ; Pratt, F L ; Lago, J ; Battle, P D ; Rosseinsky, M J. / A μSR study of high oxidation state iron oxides displaying large magnetoresistance. In: Physica B: Condensed Matter. 2000 ; Vol. 289-290. pp. 89-93.
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abstract = "The magnetic and conducting properties of many transition metal oxides may be drastically altered by doping. This study concerns a family of compounds with compositions intermediate between the itinerant helical antiferromagnet SrFeO3 and the ferromagnetic metal SrCoO3. We have measured the temperature-dependent muon-spin relaxation in five compounds in the family SrFe1-xCoxO3 where Co substitution varies from x = 0 to 0.2 and investigated the relation between the relaxation rate and the magnetic susceptibility above the ordering temperature. These materials show large magnetoresistance which may be associated with the presence of competing interactions and non-equilibrium behaviour due to cluster formation. We find a quasistatic local field at the muon site below the magnetic transition temperature indicative of magnetic order in samples with x = 0.15 and 0.2 but not in the sample with x = 0. (C) 2000 Elsevier Science B.V. All rights reserved.",
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Marshall, IM, Blundell, SJ, Husmann, A, Jestädt, T, Lovett, BW, Pratt, FL, Lago, J, Battle, PD & Rosseinsky, MJ 2000, 'A μSR study of high oxidation state iron oxides displaying large magnetoresistance', Physica B: Condensed Matter, vol. 289-290, pp. 89-93. https://doi.org/10.1016/S0921-4526(00)00269-6

A μSR study of high oxidation state iron oxides displaying large magnetoresistance. / Marshall, I M; Blundell, S J; Husmann, A ; Jestädt, T ; Lovett, Brendon W; Pratt, F L; Lago, J ; Battle, P D; Rosseinsky, M J.

In: Physica B: Condensed Matter, Vol. 289-290, 08.2000, p. 89-93.

Research output: Contribution to journalArticle

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T1 - A μSR study of high oxidation state iron oxides displaying large magnetoresistance

AU - Marshall, I M

AU - Blundell, S J

AU - Husmann, A

AU - Jestädt, T

AU - Lovett, Brendon W

AU - Pratt, F L

AU - Lago, J

AU - Battle, P D

AU - Rosseinsky, M J

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N2 - The magnetic and conducting properties of many transition metal oxides may be drastically altered by doping. This study concerns a family of compounds with compositions intermediate between the itinerant helical antiferromagnet SrFeO3 and the ferromagnetic metal SrCoO3. We have measured the temperature-dependent muon-spin relaxation in five compounds in the family SrFe1-xCoxO3 where Co substitution varies from x = 0 to 0.2 and investigated the relation between the relaxation rate and the magnetic susceptibility above the ordering temperature. These materials show large magnetoresistance which may be associated with the presence of competing interactions and non-equilibrium behaviour due to cluster formation. We find a quasistatic local field at the muon site below the magnetic transition temperature indicative of magnetic order in samples with x = 0.15 and 0.2 but not in the sample with x = 0. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - The magnetic and conducting properties of many transition metal oxides may be drastically altered by doping. This study concerns a family of compounds with compositions intermediate between the itinerant helical antiferromagnet SrFeO3 and the ferromagnetic metal SrCoO3. We have measured the temperature-dependent muon-spin relaxation in five compounds in the family SrFe1-xCoxO3 where Co substitution varies from x = 0 to 0.2 and investigated the relation between the relaxation rate and the magnetic susceptibility above the ordering temperature. These materials show large magnetoresistance which may be associated with the presence of competing interactions and non-equilibrium behaviour due to cluster formation. We find a quasistatic local field at the muon site below the magnetic transition temperature indicative of magnetic order in samples with x = 0.15 and 0.2 but not in the sample with x = 0. (C) 2000 Elsevier Science B.V. All rights reserved.

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Marshall IM, Blundell SJ, Husmann A, Jestädt T, Lovett BW, Pratt FL et al. A μSR study of high oxidation state iron oxides displaying large magnetoresistance. Physica B: Condensed Matter. 2000 Aug;289-290:89-93. https://doi.org/10.1016/S0921-4526(00)00269-6