Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions

V. Kocsis; S. Bordács; J. Deisenhofer; L. F. Kiss; K. Ohgushi; Y. Kaneko; Y. Tokura; I. Kézsmárki

doi:10.1103/PhysRevB.97.125140

Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions

V. Kocsis, S. Bordács, J. Deisenhofer, L. F. Kiss, K. Ohgushi, Y. Kaneko, Y. Tokura, I. Kézsmárki

SCI - Physics

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

12 Citations (Scopus)

Abstract

Magneto-optical effects have been investigated over the infrared visible spectral range in ACr2O4 (A=Fe,Co) spinel oxides with noncollinear spin orders in their ground states. We found large magneto-optical Kerr rotation and ellipticity at the on-site d-d transitions of the A2+ ions located within the charge gap. The magneto-optical Kerr rotation of Kerr≈12 observed in CoCr2O4 is unprecedentedly large among magnetic semiconductors and points toward the uniqueness of tetrahedrally coordinated Co2+ ions in generating strong magneto-optical response. Criteria of strong magneto-optical effects emerging at on-site d-d transitions of transition metal ions are discussed.

Original language	English
Article number	125140
Journal	Physical Review B
Volume	97
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.97.125140
Publication status	Published - 2018 Mar 23

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.97.125140

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@article{ec4d4f9280724f3ca72146c65d712160,

title = "Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions",

abstract = "Magneto-optical effects have been investigated over the infrared visible spectral range in ACr2O4 (A=Fe,Co) spinel oxides with noncollinear spin orders in their ground states. We found large magneto-optical Kerr rotation and ellipticity at the on-site d-d transitions of the A2+ ions located within the charge gap. The magneto-optical Kerr rotation of Kerr≈12 observed in CoCr2O4 is unprecedentedly large among magnetic semiconductors and points toward the uniqueness of tetrahedrally coordinated Co2+ ions in generating strong magneto-optical response. Criteria of strong magneto-optical effects emerging at on-site d-d transitions of transition metal ions are discussed.",

author = "V. Kocsis and S. Bord{\'a}cs and J. Deisenhofer and Kiss, {L. F.} and K. Ohgushi and Y. Kaneko and Y. Tokura and I. K{\'e}zsm{\'a}rki",

note = "Funding Information: The authors are grateful to N. Nagaosa, T. Arima, and K. Penc for fruitful discussions, and {\'A}. Butykai for the technical support in magnetization measurements. This work was supported by the Hungarian Research Funds OTKA K 108918, OTKA PD 111756, National Research, Development and Innovation Office – NKFIH, ANN 122879, and Bolyai 00565/14/11 and by the Deutsche Forschungsgemeinschaft through the Transregional Collaborative Research Center TRR 80. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = mar,

day = "23",

doi = "10.1103/PhysRevB.97.125140",

language = "English",

volume = "97",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

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TY - JOUR

T1 - Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions

AU - Kocsis, V.

AU - Bordács, S.

AU - Deisenhofer, J.

AU - Kiss, L. F.

AU - Ohgushi, K.

AU - Kaneko, Y.

AU - Tokura, Y.

AU - Kézsmárki, I.

N1 - Funding Information: The authors are grateful to N. Nagaosa, T. Arima, and K. Penc for fruitful discussions, and Á. Butykai for the technical support in magnetization measurements. This work was supported by the Hungarian Research Funds OTKA K 108918, OTKA PD 111756, National Research, Development and Innovation Office – NKFIH, ANN 122879, and Bolyai 00565/14/11 and by the Deutsche Forschungsgemeinschaft through the Transregional Collaborative Research Center TRR 80. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/3/23

Y1 - 2018/3/23

N2 - Magneto-optical effects have been investigated over the infrared visible spectral range in ACr2O4 (A=Fe,Co) spinel oxides with noncollinear spin orders in their ground states. We found large magneto-optical Kerr rotation and ellipticity at the on-site d-d transitions of the A2+ ions located within the charge gap. The magneto-optical Kerr rotation of Kerr≈12 observed in CoCr2O4 is unprecedentedly large among magnetic semiconductors and points toward the uniqueness of tetrahedrally coordinated Co2+ ions in generating strong magneto-optical response. Criteria of strong magneto-optical effects emerging at on-site d-d transitions of transition metal ions are discussed.

AB - Magneto-optical effects have been investigated over the infrared visible spectral range in ACr2O4 (A=Fe,Co) spinel oxides with noncollinear spin orders in their ground states. We found large magneto-optical Kerr rotation and ellipticity at the on-site d-d transitions of the A2+ ions located within the charge gap. The magneto-optical Kerr rotation of Kerr≈12 observed in CoCr2O4 is unprecedentedly large among magnetic semiconductors and points toward the uniqueness of tetrahedrally coordinated Co2+ ions in generating strong magneto-optical response. Criteria of strong magneto-optical effects emerging at on-site d-d transitions of transition metal ions are discussed.

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Strong magneto-optical effects in ACr2 O4 (A=Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions

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