Tm3Fe5O12/Pt Heterostructures with Perpendicular Magnetic Anisotropy for Spintronic Applications
Abstract
With recent developments in the field of spintronics, ferromagnetic insulator (FMI) thin films have emerged as an important component of spintronic devices. Ferrimagnetic yttrium iron garnet in particular is an excellent insulator with low Gilbert damping and a Curie temperature well above room temperature, and has been incorporated into heterostructures that exhibit a plethora of spintronic phenomena including spin pumping, spin Seebeck, and proximity effects. However, it has been a challenge to develop high quality sub‐10 nm thickness FMI garnet films with perpendicular magnetic anisotropy (PMA) and PMA garnet/heavy metal heterostructures to facilitate advances in spin‐current and anomalous Hall phenomena. Here, robust PMA in ultrathin thulium iron garnet (TmIG) films of high structural quality down to a thickness of 5.6 nm are demonstrated, which retain a saturation magnetization close to bulk. It is shown that TmIG/Pt bilayers exhibit a large spin Hall magnetoresistance (SMR) and SMR‐driven anomalous Hall effect, which indicates efficient spin transmission across the TmIG/Pt interface. These measurements are used to quantify the interfacial spin mixing conductance in TmIG/Pt and the temperature‐dependent PMA of the TmIG thin film.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 12, 2016
- Source ID
- 10.1002/aelm.201600376
Entities
People
- Andy Quindeau
- Astera S. Tang
- Can O. Avci
- Caroline Anne Ross
- Congli Sun
- David Bono
- Geoffrey S. D. Beach
- Jason Robinson
- Maxwell Mann
- Mehmet C. Onbaşlı
- Paul M. Voyles
- Wenqing Liu
- Yongbing Xu
Organizations
- Defense Advanced Research Projects Agency
- Engineering and Physical Sciences Research Council
- German Research Foundation
- Massachusetts Institute of Technology
- Max Planck Society
- University of Cambridge
- University of Wisconsin–Madison
- University of York