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Large anomalous Hall effect in L12-ordered antiferromagnetic Mn3Ir thin films
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- Hiroyuki Iwaki
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Motoi Kimata
- Institute for Materials Research, Tohoku University 2 , Sendai, Miyagi, 980-8577, Japan
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- Tetsuya Ikebuchi
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Yuta Kobayashi
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Kent Oda
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Yoichi Shiota
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Teruo Ono
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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- Takahiro Moriyama
- Institute for Chemical Research, Kyoto University 1 , Gokasho, Uji, Kyoto 611-0011, Japan
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Description
<jats:p>Antiferromagnets having negligible net magnetization but a topologically nontrivial spin structure are a good testbed for investigating the intrinsic anomalous Hall effect (AHE). In this Letter, we explore L12-ordered Mn3Ir thin films, which are one of the noncollinear antiferromagnets predicted to exhibit the intrinsic AHE due to their topologically nontrivial spin structure. The anomalous Hall conductivity as large as σAHE = 40 Ω−1 cm−1 was observed at R.T. This value can be translated to the anomalous Hall conductivity per net magnetization M as |σAHE/M| = 0.6 V−1, which is much larger compared to those for general ferromagnetic materials. We also show that σAHE depends on the crystallinity of Mn3Ir as well as the chemical order parameter S characterizing a content of the L12 phase. Our results experimentally verify that L12-ordered Mn3Ir thin films exhibit the topologically originated AHE.</jats:p>
Journal
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- Applied Physics Letters
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Applied Physics Letters 116 (2), 022408-, 2020-01-13
AIP Publishing
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Details 詳細情報について
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- CRID
- 1360568468777014784
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- ISSN
- 10773118
- 00036951
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- Article Type
- journal article
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- Data Source
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- Crossref
- KAKEN
- OpenAIRE
