Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films
Rare-earth iron garnet thin films with perpendicular magnetic anisotropy (PMA) have recently attracted a great deal of attention for spintronic applications. Thulium iron garnet (TmIG) has been successfully grown and TmIG/Pt heterostructures have been characterized. However, TmIG is not the only rar...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/117849 https://orcid.org/0000-0001-7311-3338 https://orcid.org/0000-0003-2262-1249 |
| _version_ | 1811094383696543744 |
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| author | Gonzalez-Fuentes, Claudio Mendil, Johannes Gambardella, Pietro Veis, Martin Garcia, Carlos Rosenberg, Ethan Raphael Beran, Lukas Avci, Can Onur Zeledon, Cyrus Song, Bingqian Beach, Geoffrey Stephen Ross, Caroline A |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Gonzalez-Fuentes, Claudio Mendil, Johannes Gambardella, Pietro Veis, Martin Garcia, Carlos Rosenberg, Ethan Raphael Beran, Lukas Avci, Can Onur Zeledon, Cyrus Song, Bingqian Beach, Geoffrey Stephen Ross, Caroline A |
| author_sort | Gonzalez-Fuentes, Claudio |
| collection | MIT |
| description | Rare-earth iron garnet thin films with perpendicular magnetic anisotropy (PMA) have recently attracted a great deal of attention for spintronic applications. Thulium iron garnet (TmIG) has been successfully grown and TmIG/Pt heterostructures have been characterized. However, TmIG is not the only rare-earth iron garnet that can be grown with PMA. We report the growth, magnetic, and spintronic properties of epitaxial terbium iron garnet (TbIG) and europium iron garnet (EuIG) thin films with PMA. Reciprocal space mapping shows the films are lattice matched to the substrate without strain relaxation, even for films up to 56 nm thick. The lattice strain and magnetostriction coefficient produce PMA in certain cases. TbIG grows on (111) gadolinium gallium garnet (GGG) with PMA due to the in-plane compressive strain, whereas TbIG on (111) substituted GGG (SGGG) is in tension and has an in-plane easy axis. EuIG grows with PMA on (100) and (111) GGG substrates, which facilitates the investigation of spintronic properties as a function of orientation. Both garnets have excess rare earth, which is believed to occupy Fe octahedral sites and in the case of TbIG is associated with an increase in the compensation temperature to 330 K, higher than the bulk value. Anomalous Hall effect (AHE) measurements of Pt/EuIG Hall crosses show that the spin mixing conductance of Pt/ (111) and (100) EuIG is similar. AHE measurements of Pt/TbIG Hall crosses reveal a sign change in the AHE amplitude at the compensation point analogous to all-metallic systems. |
| first_indexed | 2024-09-23T15:59:11Z |
| format | Article |
| id | mit-1721.1/117849 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:59:11Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1178492022-09-29T17:28:54Z Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films Gonzalez-Fuentes, Claudio Mendil, Johannes Gambardella, Pietro Veis, Martin Garcia, Carlos Rosenberg, Ethan Raphael Beran, Lukas Avci, Can Onur Zeledon, Cyrus Song, Bingqian Beach, Geoffrey Stephen Ross, Caroline A Massachusetts Institute of Technology. Department of Materials Science and Engineering Rosenberg, Ethan Raphael Beran, Lukas Avci, Can Onur Zeledon, Cyrus Song, Bingqian Beach, Geoffrey Stephen Ross, Caroline A Rare-earth iron garnet thin films with perpendicular magnetic anisotropy (PMA) have recently attracted a great deal of attention for spintronic applications. Thulium iron garnet (TmIG) has been successfully grown and TmIG/Pt heterostructures have been characterized. However, TmIG is not the only rare-earth iron garnet that can be grown with PMA. We report the growth, magnetic, and spintronic properties of epitaxial terbium iron garnet (TbIG) and europium iron garnet (EuIG) thin films with PMA. Reciprocal space mapping shows the films are lattice matched to the substrate without strain relaxation, even for films up to 56 nm thick. The lattice strain and magnetostriction coefficient produce PMA in certain cases. TbIG grows on (111) gadolinium gallium garnet (GGG) with PMA due to the in-plane compressive strain, whereas TbIG on (111) substituted GGG (SGGG) is in tension and has an in-plane easy axis. EuIG grows with PMA on (100) and (111) GGG substrates, which facilitates the investigation of spintronic properties as a function of orientation. Both garnets have excess rare earth, which is believed to occupy Fe octahedral sites and in the case of TbIG is associated with an increase in the compensation temperature to 330 K, higher than the bulk value. Anomalous Hall effect (AHE) measurements of Pt/EuIG Hall crosses show that the spin mixing conductance of Pt/ (111) and (100) EuIG is similar. AHE measurements of Pt/TbIG Hall crosses reveal a sign change in the AHE amplitude at the compensation point analogous to all-metallic systems. National Science Foundation (U.S.) (Grant 1122374) 2018-09-17T14:58:44Z 2018-09-17T14:58:44Z 2018-09 2018-07 2018-09-14T18:00:19Z Article http://purl.org/eprint/type/JournalArticle 2475-9953 http://hdl.handle.net/1721.1/117849 Rosenberg, Ethan R. et al. "Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films." Physical Review Materials 2, 9 (September 2018): 094405 © 2018 American Physical Society https://orcid.org/0000-0001-7311-3338 https://orcid.org/0000-0003-2262-1249 en http://dx.doi.org/10.1103/PhysRevMaterials.2.094405 Physical Review Materials 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 | Gonzalez-Fuentes, Claudio Mendil, Johannes Gambardella, Pietro Veis, Martin Garcia, Carlos Rosenberg, Ethan Raphael Beran, Lukas Avci, Can Onur Zeledon, Cyrus Song, Bingqian Beach, Geoffrey Stephen Ross, Caroline A Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title | Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title_full | Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title_fullStr | Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title_full_unstemmed | Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title_short | Magnetism and spin transport in rare-earth-rich epitaxial terbium and europium iron garnet films |
| title_sort | magnetism and spin transport in rare earth rich epitaxial terbium and europium iron garnet films |
| url | http://hdl.handle.net/1721.1/117849 https://orcid.org/0000-0001-7311-3338 https://orcid.org/0000-0003-2262-1249 |
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