Compositional dependence of the magnetic properties of epitaxial FeV/MgO thin films

Journal Article · Mon Dec 09 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4845375· OSTI ID:22253811

Eimer, S. ^[1]; Tahmasebi, T. ^[2]; Hauet, T.; Andrieu, S. ^[3]

---

1. Institut d'Electronique Fondamentale, CNRS, UMR 8622, Orsay (France)
2. IMEC, Kapeldreef 75, B-3001 Leuven (Belgium)
3. Institut Jean Lamour, CNRS - Universite de Lorraine, Boulevard des aiguillettes BP 70239, F-54506 Vandoeuvre le‘s Nancy (France)

Owing to their bcc structures and the low lattice misfit with MgO, FeV alloys are interesting for MgO-based magnetic tunnel junctions. We use vector network analyzer ferromagnetic resonance to measure the magnetization, anisotropy, exchange stiffness, and damping of epitaxial FeV/MgO thin alloys of various V contents. The low magnetization, very high exchange stiffness (23 pJ/m) and very low effective damping (<0.0026) of the alloy with 20% V content makes it an interesting candidate for spin torque applications. The ultralow damping is consistent with a spin-orbit origin, which sheds light on the possible strategies to reduce the damping in alloys.

• OSTI ID: 22253811
• Journal Information: Applied Physics Letters, Vol. 103, Issue 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
BCC LATTICES
DAMPING
EPITAXY
FERROMAGNETIC RESONANCE
FLEXIBILITY
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
SPIN
SUPERCONDUCTING JUNCTIONS
THIN FILMS