Current-Induced Domain Wall Motion in a Compensated Ferrimagnet
Owing to the difficulty in detecting and manipulating the magnetic states of antiferromagnetic materials, studying their switching dynamics using electrical methods remains a challenging task. By employing heavy-metal–rare-earth–transition-metal alloy bilayers, we experimentally study current-induce...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2018
|
| Online Access: | http://hdl.handle.net/1721.1/117209 https://orcid.org/0000-0002-9884-0598 https://orcid.org/0000-0002-6179-599X https://orcid.org/0000-0003-2262-1249 https://orcid.org/0000-0001-6892-8102 |
| _version_ | 1826190944838352896 |
|---|---|
| author | Siddiqui, Saima Afroz Han, Jiahao Finley, Joseph Tyler Ross, Caroline A Liu, Luqiao |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Siddiqui, Saima Afroz Han, Jiahao Finley, Joseph Tyler Ross, Caroline A Liu, Luqiao |
| author_sort | Siddiqui, Saima Afroz |
| collection | MIT |
| description | Owing to the difficulty in detecting and manipulating the magnetic states of antiferromagnetic materials, studying their switching dynamics using electrical methods remains a challenging task. By employing heavy-metal–rare-earth–transition-metal alloy bilayers, we experimentally study current-induced domain wall dynamics in an antiferromagnetically coupled system. We show that the current-induced domain wall mobility reaches a maximum at the angular momentum compensation point. With experiment and modeling, we further reveal the internal structures of domain walls and the underlying mechanisms for their fast motion. We show that the chirality of the ferrimagnetic domain walls remains the same across the compensation points, suggesting that spin orientations of specific sublattices rather than net magnetization determine Dzyaloshinskii-Moriya interaction in heavy-metal–ferrimagnet bilayers. The high current-induced domain wall mobility and the robust domain wall chirality in compensated ferrimagnetic material opens new opportunities for high-speed spintronic devices. |
| first_indexed | 2024-09-23T08:48:01Z |
| format | Article |
| id | mit-1721.1/117209 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:48:01Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1172092024-07-15T17:35:17Z Current-Induced Domain Wall Motion in a Compensated Ferrimagnet Siddiqui, Saima Afroz Han, Jiahao Finley, Joseph Tyler Ross, Caroline A Liu, Luqiao Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Materials Science and Engineering Siddiqui, Saima Afroz Han, Jiahao Finley, Joseph Tyler Ross, Caroline A Liu, Luqiao Owing to the difficulty in detecting and manipulating the magnetic states of antiferromagnetic materials, studying their switching dynamics using electrical methods remains a challenging task. By employing heavy-metal–rare-earth–transition-metal alloy bilayers, we experimentally study current-induced domain wall dynamics in an antiferromagnetically coupled system. We show that the current-induced domain wall mobility reaches a maximum at the angular momentum compensation point. With experiment and modeling, we further reveal the internal structures of domain walls and the underlying mechanisms for their fast motion. We show that the chirality of the ferrimagnetic domain walls remains the same across the compensation points, suggesting that spin orientations of specific sublattices rather than net magnetization determine Dzyaloshinskii-Moriya interaction in heavy-metal–ferrimagnet bilayers. The high current-induced domain wall mobility and the robust domain wall chirality in compensated ferrimagnetic material opens new opportunities for high-speed spintronic devices. National Science Foundation (U. S.) (Grant No. 1639921) Nanoelectronics Research Corporation Nanoelectronics Research Initiative Center (Research Task ID No. 2700.001) 2018-07-31T12:43:34Z 2018-07-31T12:43:34Z 2018-07 2018-03 2018-07-30T16:18:09Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/117209 Siddiqui, Saima A., Jiahao Han, Joseph T. Finley, Caroline A. Ross and Luqiao Liu. "Current-Induced Domain Wall Motion in a Compensated Ferrimagnet." Physical Review Letters 121 (2018), 057701. https://orcid.org/0000-0002-9884-0598 https://orcid.org/0000-0002-6179-599X https://orcid.org/0000-0003-2262-1249 https://orcid.org/0000-0001-6892-8102 en http://dx.doi.org/10.1103/PhysRevLett.121.057701 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Siddiqui, Saima Afroz Han, Jiahao Finley, Joseph Tyler Ross, Caroline A Liu, Luqiao Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title | Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title_full | Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title_fullStr | Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title_full_unstemmed | Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title_short | Current-Induced Domain Wall Motion in a Compensated Ferrimagnet |
| title_sort | current induced domain wall motion in a compensated ferrimagnet |
| url | http://hdl.handle.net/1721.1/117209 https://orcid.org/0000-0002-9884-0598 https://orcid.org/0000-0002-6179-599X https://orcid.org/0000-0003-2262-1249 https://orcid.org/0000-0001-6892-8102 |
| work_keys_str_mv | AT siddiquisaimaafroz currentinduceddomainwallmotioninacompensatedferrimagnet AT hanjiahao currentinduceddomainwallmotioninacompensatedferrimagnet AT finleyjosephtyler currentinduceddomainwallmotioninacompensatedferrimagnet AT rosscarolinea currentinduceddomainwallmotioninacompensatedferrimagnet AT liuluqiao currentinduceddomainwallmotioninacompensatedferrimagnet |