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

doi:10.1016/S0921-4526(00)00269-6

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

School of Engineering & Physical Sciences

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5 Citations (Scopus)

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 language	English
Pages (from-to)	89-93
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	289-290
DOIs	https://doi.org/10.1016/S0921-4526(00)00269-6
Publication status	Published - Aug 2000

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title = "A μSR study of high oxidation state iron oxides displaying large magnetoresistance",

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.",

author = "Marshall, {I M} and Blundell, {S J} and A Husmann and T Jest{\"a}dt and Lovett, {Brendon W} and Pratt, {F L} and J Lago and Battle, {P D} and Rosseinsky, {M J}",

year = "2000",

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doi = "10.1016/S0921-4526(00)00269-6",

language = "English",

volume = "289-290",

pages = "89--93",

journal = "Physica B: Condensed Matter",

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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

PY - 2000/8

Y1 - 2000/8

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.

U2 - 10.1016/S0921-4526(00)00269-6

DO - 10.1016/S0921-4526(00)00269-6

M3 - Article

SN - 0921-4526

VL - 289-290

SP - 89

EP - 93

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

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

Abstract

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