Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance
Altermagnets have spin-split band structures that correspond to the rotational symmetry of the two sublattices in real space. Theoretically, their unique band structures are expected to exhibit intriguing transport phenomena, depending on their magnetic structures. Anomalous Hall effect (AHE) measur...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2024-11-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0213320 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850178775792222208 |
|---|---|
| author | Yuta Kobayashi Shutaro Karube Itaru Sugiura Hideki Narita Ryusuke Hisatomi Yoichi Shiota Teruo Ono |
| author_facet | Yuta Kobayashi Shutaro Karube Itaru Sugiura Hideki Narita Ryusuke Hisatomi Yoichi Shiota Teruo Ono |
| author_sort | Yuta Kobayashi |
| collection | DOAJ |
| description | Altermagnets have spin-split band structures that correspond to the rotational symmetry of the two sublattices in real space. Theoretically, their unique band structures are expected to exhibit intriguing transport phenomena, depending on their magnetic structures. Anomalous Hall effect (AHE) measurement is a method by which to electrically detect magnetic structure and has been reported for typical altermagnets, such as RuO2 and MnTe. However, AHE measurements are limited to specific cases. Thus, it is important to apply other methods by which to determine functionality based on magnetic structure. In this study, we report the spin Hall magnetoresistance (SMR) in a RuO2 (1 nm)/Pt (10 nm) system. A negative SMR signal is clearly observed, indicating the spin-flop antiferromagnetic structure of RuO2. Interestingly, a negative SMR was observed, even at 1 T, which is much smaller than the estimated spin-flop field reported in a previous study. This reflects the thinner film of RuO2 in our study, suggesting that thickness control is effective in adjusting the magnetic anisotropy of RuO2. In addition, the temperature-dependent SMR measurement revealed the Néel temperature of 1 nm thick RuO2 to be 70 ± 9 K. Our results show that SMR measurement can serve as an efficient tool to explore the magnetic features in an altermagnet. |
| format | Article |
| id | doaj-art-aa77859a46f548a5a4e5ee6255829ecc |
| institution | OA Journals |
| issn | 2158-3226 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-aa77859a46f548a5a4e5ee6255829ecc2025-08-20T02:18:39ZengAIP Publishing LLCAIP Advances2158-32262024-11-011411115120115120-510.1063/5.0213320Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistanceYuta Kobayashi0Shutaro Karube1Itaru Sugiura2Hideki Narita3Ryusuke Hisatomi4Yoichi Shiota5Teruo Ono6Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanInstitute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanAltermagnets have spin-split band structures that correspond to the rotational symmetry of the two sublattices in real space. Theoretically, their unique band structures are expected to exhibit intriguing transport phenomena, depending on their magnetic structures. Anomalous Hall effect (AHE) measurement is a method by which to electrically detect magnetic structure and has been reported for typical altermagnets, such as RuO2 and MnTe. However, AHE measurements are limited to specific cases. Thus, it is important to apply other methods by which to determine functionality based on magnetic structure. In this study, we report the spin Hall magnetoresistance (SMR) in a RuO2 (1 nm)/Pt (10 nm) system. A negative SMR signal is clearly observed, indicating the spin-flop antiferromagnetic structure of RuO2. Interestingly, a negative SMR was observed, even at 1 T, which is much smaller than the estimated spin-flop field reported in a previous study. This reflects the thinner film of RuO2 in our study, suggesting that thickness control is effective in adjusting the magnetic anisotropy of RuO2. In addition, the temperature-dependent SMR measurement revealed the Néel temperature of 1 nm thick RuO2 to be 70 ± 9 K. Our results show that SMR measurement can serve as an efficient tool to explore the magnetic features in an altermagnet.http://dx.doi.org/10.1063/5.0213320 |
| spellingShingle | Yuta Kobayashi Shutaro Karube Itaru Sugiura Hideki Narita Ryusuke Hisatomi Yoichi Shiota Teruo Ono Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance AIP Advances |
| title | Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance |
| title_full | Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance |
| title_fullStr | Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance |
| title_full_unstemmed | Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance |
| title_short | Detection of antiferromagnetic order in a RuO2/Pt bilayer by spin Hall magnetoresistance |
| title_sort | detection of antiferromagnetic order in a ruo2 pt bilayer by spin hall magnetoresistance |
| url | http://dx.doi.org/10.1063/5.0213320 |
| work_keys_str_mv | AT yutakobayashi detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT shutarokarube detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT itarusugiura detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT hidekinarita detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT ryusukehisatomi detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT yoichishiota detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance AT teruoono detectionofantiferromagneticorderinaruo2ptbilayerbyspinhallmagnetoresistance |