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Title: High power all-metal spin torque oscillator using full Heusler Co{sub 2}(Fe,Mn)Si

We showed the high rf power (P{sub out}) emission from an all-metal spin torque oscillator (STO) with a Co{sub 2}Fe{sub 0.4}Mn{sub 0.6}Si (CFMS)/Ag/CFMS giant magnetoresistance (GMR) stack, which was attributable to the large GMR effect thanks to the highly spin-polarized CFMS. The oscillation spectra were measured by varying the magnetic field direction, and the perpendicular magnetic field was effective to increase P{sub out} and the Q factor. We simultaneously achieved a high output efficiency of 0.013%, a high Q of 1124, and large frequency tunability. CFMS-based all-metal STO is promising for overcoming the difficulties that conventional STOs are confronted with.
Authors:
; ; ; ;  [1] ; ;  [2]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  2. Spintronics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568 (Japan)
Publication Date:
OSTI Identifier:
22311024
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT COMPOUNDS; EFFICIENCY; EMISSION; IRON COMPOUNDS; MAGNETIC FIELDS; MAGNETORESISTANCE; MANGANESE COMPOUNDS; METALS; OSCILLATIONS; OSCILLATORS; RF SYSTEMS; SILICON COMPOUNDS; SILVER; SPECTRA; SPIN; SPIN ORIENTATION