Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃
The combination of ferromagnets with topological superconductors or insulators allows for new phases of matter that support excitations such as chiral edge modes and Majorana fermions. EuS, a wide-bandgap ferromagnetic insulator with a Curie temperature around 16 K, and SrTiO₃ (STO), an important su...
| 主要な著者: | , , , , , |
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| フォーマット: | 論文 |
| 言語: | English |
| 出版事項: |
American Physical Society
2017
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| オンライン･アクセス: | http://hdl.handle.net/1721.1/112968 https://orcid.org/0000-0002-6394-4987 https://orcid.org/0000-0002-2480-1211 |
| _version_ | 1826190647065837568 |
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| author | Rosenberg, Aaron J. Kirtley, John R. Moler, Kathryn A. Katmis, Ferhat Gedik, Nuh Moodera, Jagadeesh |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Rosenberg, Aaron J. Kirtley, John R. Moler, Kathryn A. Katmis, Ferhat Gedik, Nuh Moodera, Jagadeesh |
| author_sort | Rosenberg, Aaron J. |
| collection | MIT |
| description | The combination of ferromagnets with topological superconductors or insulators allows for new phases of matter that support excitations such as chiral edge modes and Majorana fermions. EuS, a wide-bandgap ferromagnetic insulator with a Curie temperature around 16 K, and SrTiO₃ (STO), an important substrate for engineering heterostructures, may support these phases. We present scanning superconducting quantum interference device measurements of EuS grown epitaxially on STO that reveal micron-scale variations in ferromagnetism and paramagnetism. These variations are oriented along the STO crystal axes and only change their configuration upon thermal cycling above the STO cubic-to-tetragonal structural transition temperature at 105 K, indicating that the observed magnetic features are due to coupling between EuS and the STO tetragonal structure. We speculate that the STO tetragonal distortions may strain the EuS, altering the magnetic anisotropy on a micron scale. This result demonstrates that local variation in the induced magnetic order from EuS grown on STO needs to be considered when engineering new phases of matter that require spatially homogeneous exchange. |
| first_indexed | 2024-09-23T08:43:32Z |
| format | Article |
| id | mit-1721.1/112968 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:43:32Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1129682022-09-30T10:48:29Z Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ Rosenberg, Aaron J. Kirtley, John R. Moler, Kathryn A. Katmis, Ferhat Gedik, Nuh Moodera, Jagadeesh Massachusetts Institute of Technology. Department of Physics Katmis, Ferhat Gedik, Nuh Moodera, Jagadeesh The combination of ferromagnets with topological superconductors or insulators allows for new phases of matter that support excitations such as chiral edge modes and Majorana fermions. EuS, a wide-bandgap ferromagnetic insulator with a Curie temperature around 16 K, and SrTiO₃ (STO), an important substrate for engineering heterostructures, may support these phases. We present scanning superconducting quantum interference device measurements of EuS grown epitaxially on STO that reveal micron-scale variations in ferromagnetism and paramagnetism. These variations are oriented along the STO crystal axes and only change their configuration upon thermal cycling above the STO cubic-to-tetragonal structural transition temperature at 105 K, indicating that the observed magnetic features are due to coupling between EuS and the STO tetragonal structure. We speculate that the STO tetragonal distortions may strain the EuS, altering the magnetic anisotropy on a micron scale. This result demonstrates that local variation in the induced magnetic order from EuS grown on STO needs to be considered when engineering new phases of matter that require spatially homogeneous exchange. National Science Foundation (U.S.) (Grant DMR-1207469) United States. Office of Naval Research (Grant N00014-13-1-0301) United States. Office of Naval Research (Grant N00014-16-1-2657) 2017-12-29T16:00:47Z 2017-12-29T16:00:47Z 2017-12 2017-06 2017-12-15T18:00:10Z Article http://purl.org/eprint/type/JournalArticle 2475-9953 http://hdl.handle.net/1721.1/112968 Rosenberg, Aaron J. et al. "Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃" Physical Review Materials 1, 7 (December 2017): 074406 © 2017 American Physical Society https://orcid.org/0000-0002-6394-4987 https://orcid.org/0000-0002-2480-1211 en http://dx.doi.org/10.1103/PhysRevMaterials.1.074406 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 | Rosenberg, Aaron J. Kirtley, John R. Moler, Kathryn A. Katmis, Ferhat Gedik, Nuh Moodera, Jagadeesh Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title | Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title_full | Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title_fullStr | Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title_full_unstemmed | Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title_short | Spatially modulated magnetic structure of EuS due to the tetragonal domain structure of SrTiO₃ |
| title_sort | spatially modulated magnetic structure of eus due to the tetragonal domain structure of srtio₃ |
| url | http://hdl.handle.net/1721.1/112968 https://orcid.org/0000-0002-6394-4987 https://orcid.org/0000-0002-2480-1211 |
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