A 4-Fold-Symmetry Hexagonal Ruthenium for Magnetic Heterostructures Exhibiting Enhanced Perpendicular Magnetic Anisotropy and Tunnel Magnetoresistance

Zhenchao Wen, Hiroaki Sukegawa, Takao Furubayashi, Jungwoo Koo, Koichiro Inomata, Seiji Mitani, Jason Paul Hadorn, Tadakatsu Ohkubo, Kazuhiro Hono

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

A 4-fold-symmetry hexagonal Ru emerging in epitaxial MgO/Ru/Co2FeAl/MgO heterostructures is reported, in which an approximately Ru(022¯3) growth attributes to the lattice matching between MgO, Ru, and Co2FeAl. Perpendicular magnetic anisotropy of the Co2FeAl/MgO interface is substantially enhanced. The magnetic tunnel junctions (MTJs) incorporating this structure give rise to the largest tunnel magnetoresistance for perpendicular MTJs using low damping Heusler alloys.

Original languageEnglish
Pages (from-to)6483-6490
Number of pages8
JournalAdvanced Materials
Volume26
Issue number37
DOIs
Publication statusPublished - 2014 Oct 1

Keywords

  • 4-fold-symmetry hexagonal ruthenium
  • magnetic heterostructures
  • perpendicular magnetic anisotropy
  • tunnel magnetoresistance

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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