We report a change in the structural and magnetic properties of epitaxial Mn5Ge3 on a Ge-on-Si (111) substrate by applying strain engineering through ms-range flash lamp annealing (FLA). X-ray diffraction results demonstrate that during FLA for 20 ms, the formation of nonmagnetic MnxGey secondary phases is suppressed, while the in-plane expansion of the lattice increases with increasing annealing temperature. Temperature-dependent magnetization results indicate that the Curie temperature of Mn5Ge3 rises from 287 K in the as-prepared sample to above 400 K after FLA, making Mn5Ge3 an attractive material for spintronics. Experimental results together with theoretical Monte Carlo simulations allow us to conclude that the expansion of the in-plane lattice causes the increase of the Curie temperature due to enhancement of the ferromagnetic interaction between Mn atoms.
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14 March 2022
Research Article|
March 09 2022
Tuning of Curie temperature in Mn5Ge3 films
Yufang Xie
;
Yufang Xie
a)
1
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
, 01328 Dresden, Germany
2
Technische Universität Dresden
, 01062 Dresden, Germany
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Magdalena Birowska
;
Magdalena Birowska
3
Faculty of Physics, Institute of Theoretical Physics, University of Warsaw
, Pasteura 5, 02093 Warsaw, Poland
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Hannes Simon Funk
;
Hannes Simon Funk
4
Institut für Halbleitertechnik, Universität Stuttgart
, 70569 Stuttgart, Germany
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Inga Anita Fischer;
Inga Anita Fischer
4
Institut für Halbleitertechnik, Universität Stuttgart
, 70569 Stuttgart, Germany
5
Experimental Physics and Functional Materials, BTU Cottbus-Senftenberg
, Erich-Weinert-Str. 1, 03046 Cottbus, Germany
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Daniel Schwarz
;
Daniel Schwarz
4
Institut für Halbleitertechnik, Universität Stuttgart
, 70569 Stuttgart, Germany
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Jörg Schulze;
Jörg Schulze
4
Institut für Halbleitertechnik, Universität Stuttgart
, 70569 Stuttgart, Germany
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Yu-Jia Zeng
;
Yu-Jia Zeng
6
College of Physics and Optoelectronic Engineering, Shenzhen University
, Shenzhen 518060, People’s Republic of China
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Manfred Helm;
Manfred Helm
1
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
, 01328 Dresden, Germany
2
Technische Universität Dresden
, 01062 Dresden, Germany
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Shengqiang Zhou
;
Shengqiang Zhou
1
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
, 01328 Dresden, Germany
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Slawomir Prucnal
Slawomir Prucnal
a)
1
Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf
, 01328 Dresden, Germany
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J. Appl. Phys. 131, 105102 (2022)
Article history
Received:
August 12 2021
Accepted:
February 03 2022
Citation
Yufang Xie, Magdalena Birowska, Hannes Simon Funk, Inga Anita Fischer, Daniel Schwarz, Jörg Schulze, Yu-Jia Zeng, Manfred Helm, Shengqiang Zhou, Slawomir Prucnal; Tuning of Curie temperature in Mn5Ge3 films. J. Appl. Phys. 14 March 2022; 131 (10): 105102. https://doi.org/10.1063/5.0066717
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