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

Journal Article · Mon Sep 01 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4895024· OSTI ID:22311024

Seki, Takeshi; Sakuraba, Yuya; Ueda, Masaki; Okura, Ryo; Takanashi, Koki ^[1]; Arai, Hiroko; Imamura, Hiroshi ^[2]

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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)

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.

• OSTI ID: 22311024
• Journal Information: Applied Physics Letters, Vol. 105, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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