Complex magnetic order and spin chirality on the Kagoḿ lattices of BaMn2.49 Ru3.51 O11 and BaFe3.26 Ti2.74 O11

L. Shlyk; S. Parkin; L. E. De Long

doi:10.1063/1.3364060

Complex magnetic order and spin chirality on the Kagoḿ lattices of BaMn2.49 Ru3.51 O11 and BaFe3.26 Ti2.74 O11

L. Shlyk, S. Parkin, L. E. De Long

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

5 Scopus citations

Abstract

Anomalies in the magnetization of single-crystal BaMn2.49 Ru3.51 O11 at temperatures T₁ =183 K, T₂ =171 K, and T₃ =128 K, signal complex magnetic order induced by competing ferro- and antiferromagnetic correlations and magnetic frustration within the Kagoḿ (hexagonal ab-) plane. The T₂ - and T₃ -anomalies and unconventional transverse magnetoresistance are observed only for applied field H directed in the Kagoḿ plane, suggesting a topological Hall effect is generated by nonzero scalar chirality of spins canted out of the Kagoḿ plane, but is suppressed in a collinear structure induced by only modest H⊥c. In contrast, the magnetic susceptibility of an isostructural BaFe3.26 Ti2.74 O11 single-crystal reveals magnetic transitions at T₁ =250 K and T₂ =85 K for H oriented both parallel and perpendicular to the c-axis. The rapid low-field increase of the magnetic moment at μo H<1T, followed by nonsaturation with a near-linear increase at high fields, are typical of a canted antiferromagnet or ferrimagnet.

Original language	English
Article number	09E109
Journal	Journal of Applied Physics
Volume	107
Issue number	9
DOIs	https://doi.org/10.1063/1.3364060
State	Published - May 1 2010

Bibliographical note

Funding Information:
Research at the University of Kentucky was supported by U.S. DOE Grant No. DOE-FGØ2-97ER45653.

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Complex magnetic order and spin chirality on the Kagoḿ lattices of BaMn2.49 Ru3.51 O11 and BaFe3.26 Ti2.74 O11",

abstract = "Anomalies in the magnetization of single-crystal BaMn2.49 Ru3.51 O11 at temperatures T1 =183 K, T2 =171 K, and T3 =128 K, signal complex magnetic order induced by competing ferro- and antiferromagnetic correlations and magnetic frustration within the Kagoḿ (hexagonal ab-) plane. The T2 - and T3 -anomalies and unconventional transverse magnetoresistance are observed only for applied field H directed in the Kagoḿ plane, suggesting a topological Hall effect is generated by nonzero scalar chirality of spins canted out of the Kagoḿ plane, but is suppressed in a collinear structure induced by only modest H⊥c. In contrast, the magnetic susceptibility of an isostructural BaFe3.26 Ti2.74 O11 single-crystal reveals magnetic transitions at T1 =250 K and T2 =85 K for H oriented both parallel and perpendicular to the c-axis. The rapid low-field increase of the magnetic moment at μo H<1T, followed by nonsaturation with a near-linear increase at high fields, are typical of a canted antiferromagnet or ferrimagnet.",

author = "L. Shlyk and S. Parkin and {De Long}, {L. E.}",

note = "Funding Information: Research at the University of Kentucky was supported by U.S. DOE Grant No. DOE-FG{\O}2-97ER45653.",

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T1 - Complex magnetic order and spin chirality on the Kagoḿ lattices of BaMn2.49 Ru3.51 O11 and BaFe3.26 Ti2.74 O11

AU - Shlyk, L.

AU - Parkin, S.

AU - De Long, L. E.

N1 - Funding Information: Research at the University of Kentucky was supported by U.S. DOE Grant No. DOE-FGØ2-97ER45653.

PY - 2010/5/1

Y1 - 2010/5/1

N2 - Anomalies in the magnetization of single-crystal BaMn2.49 Ru3.51 O11 at temperatures T1 =183 K, T2 =171 K, and T3 =128 K, signal complex magnetic order induced by competing ferro- and antiferromagnetic correlations and magnetic frustration within the Kagoḿ (hexagonal ab-) plane. The T2 - and T3 -anomalies and unconventional transverse magnetoresistance are observed only for applied field H directed in the Kagoḿ plane, suggesting a topological Hall effect is generated by nonzero scalar chirality of spins canted out of the Kagoḿ plane, but is suppressed in a collinear structure induced by only modest H⊥c. In contrast, the magnetic susceptibility of an isostructural BaFe3.26 Ti2.74 O11 single-crystal reveals magnetic transitions at T1 =250 K and T2 =85 K for H oriented both parallel and perpendicular to the c-axis. The rapid low-field increase of the magnetic moment at μo H<1T, followed by nonsaturation with a near-linear increase at high fields, are typical of a canted antiferromagnet or ferrimagnet.

AB - Anomalies in the magnetization of single-crystal BaMn2.49 Ru3.51 O11 at temperatures T1 =183 K, T2 =171 K, and T3 =128 K, signal complex magnetic order induced by competing ferro- and antiferromagnetic correlations and magnetic frustration within the Kagoḿ (hexagonal ab-) plane. The T2 - and T3 -anomalies and unconventional transverse magnetoresistance are observed only for applied field H directed in the Kagoḿ plane, suggesting a topological Hall effect is generated by nonzero scalar chirality of spins canted out of the Kagoḿ plane, but is suppressed in a collinear structure induced by only modest H⊥c. In contrast, the magnetic susceptibility of an isostructural BaFe3.26 Ti2.74 O11 single-crystal reveals magnetic transitions at T1 =250 K and T2 =85 K for H oriented both parallel and perpendicular to the c-axis. The rapid low-field increase of the magnetic moment at μo H<1T, followed by nonsaturation with a near-linear increase at high fields, are typical of a canted antiferromagnet or ferrimagnet.

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Complex magnetic order and spin chirality on the Kagoḿ lattices of BaMn2.49 Ru3.51 O11 and BaFe3.26 Ti2.74 O11

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