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Band match enhanced current-in-plane giant magnetoresistance in epitaxial Co50Fe50/Cu multilayers with metastable bcc-Cu spacer
- Source :
- APL Materials, Vol 7, Iss 11, Pp 111106-111106-7 (2019)
- Publication Year :
- 2019
- Publisher :
- AIP Publishing LLC, 2019.
-
Abstract
- Although current in-plane giant magnetoresistance (CIP-GMR) is widely used as various magnetic field sensors, a higher magnetoresistance (MR) ratio is still required to improve their sensitivity and detectivity for certain applications. Here, we report dramatic enhancement of the MR ratio up to 26.5% in a spin valve device and 40.5% in an antiferromagnetically coupled trilayer device using fully epitaxial Co50Fe50/Cu/Co50Fe50 structures with metastable bcc-Cu spacer layers. Transmission electron microscopy analysis indicated that the metastable bcc-Cu had a perfect lattice match at the bcc-Co50Fe50/bcc-Cu interfaces. First-principles calculations showed good electronic band matching that induces a large spin asymmetry of the electron transmittance in the in-plane direction. The combination of this substantial lattice match and electronic band match is attributed to the large MR ratio, suggesting that exploring the use of metastable structure in ferromagnetic/nonferromagnetic multilayers will lead to further enhancement of CIP-GMR.
- Subjects :
- Biotechnology
TP248.13-248.65
Physics
QC1-999
Subjects
Details
- Language :
- English
- ISSN :
- 2166532X
- Volume :
- 7
- Issue :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- APL Materials
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.9789d12ea494491d988eb6cf0dc36bed
- Document Type :
- article
- Full Text :
- https://doi.org/10.1063/1.5119370