10.1016/j.jmmm.2020.166885
https://zenodo.org/records/3843443
oai:zenodo.org:3843443
Emanuele Longo
Emanuele Longo
CNR-IMM Unit of Agrate Brianza
Claudia Wiemer
Claudia Wiemer
CNR-IMM Unit of Agrate Brianza
Matteo Belli
Matteo Belli
CNR-IMM Unit of Agrate Brianza
Raimondo Cecchini
Raimondo Cecchini
CNR-IMM Unit of Agrate Brianza
Massimo Longo
Massimo Longo
CNR-IMM Unit of Agrate Brianza
Matteo Cantoni
Matteo Cantoni
Dipartimento di Fisica, Politecnico di Milano
Christian Rinaldi
Christian Rinaldi
Dipartimento di Fisica, Politecnico di Milano
Michael D. Overbeek
Michael D. Overbeek
Winter Laboratory, Wayne State University
Charles H. Winter
Charles H. Winter
Winter Laboratory, Wayne State University
Gianluca Gubbiotti
Gianluca Gubbiotti
CNR-IOM, Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia
Graziella Tallarida
Graziella Tallarida
CNR-IMM Unit of Agrate Brianza
Marco Fanciulli
Marco Fanciulli
Università degli studi di Milano-Bicocca, Dipartimento di Scienze dei Materiali
Roberto Mantovan
Roberto Mantovan
CNR-IMM Unit of Agrate Brianza
Ferromagnetic resonance of Co thin films grown by atomic layer deposition on the Sb2Te3 topological insulator
Zenodo
2020
FMR, ALD, topological insulators, spintronics
2020-04-10
eng
10.1016/j.jmmm.2020.166885
https://zenodo.org/communities/eu
preprint
Creative Commons Attribution 4.0 International
Interfacing ferromagnetic materials with topological insulators is an intriguing strategy in order to enhance spin-to-charge conversion mechanisms, paving the way toward highly efficient spin-based electronic devices. In particular, the use of large-scale deposition techniques is demanding for a sustainable and cost-effective industrial technology transfer. In this work, we study the magnetic properties of the Co/Sb2Te3 heterostructure, where the ferromagnetic Co layer is deposited by atomic layer deposition on top of the Sb2Te3 topological insulator, which is grown by metal organic chemical vapor deposition. In particular, broadband ferromagnetic resonance is employed to characterize the Co/Sb2Te3 system and the reference heterostructure Co/Pt. For Co/Sb2Te3, we extract an effective magnetic anisotropy constant Keff=4.26∙106 erg/cm3 , which is an order of magnitude higher than in Co/Pt (Keff=0.43∙106 erg/cm3). The large difference in the Keff values observed in Co/Sb2Te3 and Co/Pt is explained in terms of the different Co crystalline structures achieved on top of Sb2Te3 and Pt, respectively. Interestingly, the Co/Sb2Te3 system displays a relatively large Gilbert damping constant (α = 0.095), which we suggest as possibly due to spin pumping from the Co layer into the Sb2Te3 topological insulator.
European Commission
10.13039/501100000780
824123
Skyrmion-Topological insulator and Weyl semimetal technology