Sputtered L10‐FePd and its Synthetic Antiferromagnet on Si/SiO2 Wafers for Scalable Spintronics
Abstract
As a promising alternative to the mainstream CoFeB/MgO system with interfacial perpendicular magnetic anisotropy (PMA), L10‐FePd and its synthetic antiferromagnet (SAF) structure with large crystalline PMA can support spintronic devices with sufficient thermal stability at sub‐5 nm sizes. However, the compatibility requirement of preparing L10‐FePd thin films on Si/SiO2 wafers is still unmet. In this paper, high‐quality L10‐FePd and its SAF on Si/SiO2 wafers are prepared by coating the amorphous SiO2 surface with an MgO(001) seed layer. The prepared L10‐FePd single layer and SAF stack are highly (001)‐textured, showing strong PMA, low damping, and sizeable interlayer exchange coupling, respectively. Systematic characterizations, including advanced X‐ray diffraction measurement and atomic resolution‐scanning transmission electron microscopy, are conducted to explain the outstanding performance of L10‐FePd layers. A fully‐epitaxial growth that starts from MgO seed layer, induces the (001) texture of L10‐FePd, and extends through the SAF spacer is observed. This study makes the vision of scalable spintronics more practical.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 20, 2023
- Source ID
- 10.1002/adfm.202214201
Entities
People
- Brandon R. Zink
- Daniel B Gopman
- Deyuan Lyu
- Dingbin Huang
- Geoffrey A. Rojas
- Guichuan Yu
- Javier García‐barriocanal
- Jenae E. Shoup
- Jian-Ping Wang
- Qi Jia
- William Echtenkamp
- Xiaojia Wang
Organizations
- Defense Advanced Research Projects Agency
- National Institute of Standards and Technology
- National Science Foundation
- University of Minnesota