journal article·2023-01-01Open access

Modified magnetism in heterostructures of Cr2Ge2Te6 and oxides

A. E. Llacsahuanga Allcca, H. Idzuchi, X. C. Pan, K. Tanigaki, Y. P. Chen

AIP Advances· Volume 13· Issue 1

Abstract

We study the effects of interfacing the van der Waals ferromagnet Cr2Ge2Te6 with oxide layers, such as NiO and MgO, in a few different configurations. For this, the magnetic hysteresis curves, obtained by magneto optical Kerr effect, of Cr2Ge2Te6 flakes of similar thicknesses were evaluated. Compared to the properties of a bare Cr2Ge2Te6, we observed an increased perpendicular magnetic anisotropy and enhanced Curie temperature in the Cr2Ge2Te6/NiO heterostructure. In contrast, we report little or no change of the magnetic properties in a Cr2Ge2Te6/NiO and Cr2Ge2Te6/MgO where the Cr2Ge2Te6 was exfoliated on top of the oxide layer. Finally, strain is considered as the mechanism of the enhancement, as we observed the formation of wrinkles in thin Cr2Ge2Te6/NiO heterostructure and the Raman characteristics close to the wrinkles indicated a tensile strain, which is consistent with stronger ferromagnetism in Cr2Ge2Te6.
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Research context

OpenAlex topics: 2D Materials and Applications · ZnO doping and properties · Heusler alloys: electronic and magnetic properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics and Astronomy, Purdue University 1 , West Lafayette, Indiana 47907, USA

WPI Advanced Institute for Materials Research (AIMR), Tohoku University 2 , Sendai 980-8577, Japan

Center for Science and Innovation in Spintronics (CSIS), Tohoku University 3 , Sendai 980-8577, Japan

Department of Physics, The University of Tokyo 4 , Bunkyo-ku, Tokyo 113-0033, Japan

Beijing Academy of Quantum Information and Sciences 5 , Haiden District, Beijing 100193, China

School of Electrical and Computer Engineering and Birck Nanotechnology Center and Purdue Quantum Science and Engineering Institute, Purdue University 6 , West Lafayette, Indiana 47907, USA

Institute of Physics and Astronomy and Villum Centers for Dirac Materials and for Hybrid Quantum Materials and Devices, Aarhus University 7 , 8000 Aarhus-C, Denmark

Funding

Murata Foundation · KAKENHI · NSF

References (23)

Show source-provided references
1. Nature · 2017 · 546 · 27010.1038/nature22391 ↗
2. Nature · 2017 · 546 · 26510.1038/nature22060 ↗
3. Nat. Mater. · 2018 · 17 · 77810.1038/s41563-018-0149-7 ↗
4. Nat. Nanotechnol. · 2018 · 13 · 55410.1038/s41565-018-0186-z ↗
5. Nature · 2018 · 563 · 9410.1038/s41586-018-0626-9 ↗
6. Nat. Nanotechnol. · 2018 · 13 · 54910.1038/s41565-018-0135-x ↗
7. Nat. Nanotechnol. · 2018 · 13 · 54410.1038/s41565-018-0121-3 ↗
8. Nat. Electron. · 2020 · 3 · 46010.1038/s41928-020-0427-7 ↗
9. J. Am. Chem. Soc. · 2019 · 141 · 1716610.1021/jacs.9b06929 ↗
10. Adv. Mater. · 2020 · 32 · 200203210.1002/adma.202002032 ↗
11. Science · 2019 · 363 · eaav445010.1126/science.aav4450 ↗
12. Appl. Phys. Lett. · 2019 · 115 · 23240310.1063/1.5130930 ↗
13. Nano Lett. · 2022 · 22 · 316510.1021/acs.nanolett.1c04665 ↗
14. Appl. Phys. Lett. · 1992 · 60 · 306010.1063/1.106756 ↗
15. M.-H. Phan, V. Kalappattil, V. O. Jimenez, Y. T. H. Pham, N. W. Mudiyanselage, D. Detellem, C.-M. Hung, A. Chanda, and T. Eggers, arXiv:2201.00479 (2022).
16. Phys. Rev. B · 2019 · 100 · 22442710.1103/physrevc.100.034907 ↗
17. Phys. Rev. B · 2020 · 102 · 14444310.1103/physrevb.102.144443 ↗
18. Phys. Rev. B · 2013 · 87 · 01441810.1103/physrevb.87.014418 ↗
19. J. Phys. Condens. Matter · 2016 · 28 · 27520110.1088/0953-8984/28/27/275201 ↗
20. APL Mater. · 2013 · 1 · 01100210.1063/1.4812323 ↗
21. Sci. Data · 2015 · 2 · 110.1038/sdata.2015.9 ↗
22. 2D Mater. · 2016 · 3 · 02503510.1088/2053-1583/3/2/025035 ↗
23. Appl. Phys. Lett. · 2018 · 112 · 07240910.1063/1.5016568 ↗