skip to main content

Title: Zero-field spin torque oscillation in Co{sub 2}(Fe, Mn)Si with a point contact geometry

We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co{sub 2}Fe{sub 0.4}Mn{sub 0.6}Si (CFMS) Heusler alloy. The device emitted a high rf power (P{sub rf}) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large P{sub rf} of 25.7 nW was achieved. The large P{sub rf} and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.
Authors:
; ; ;  [1] ;  [1] ;  [2]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22412760
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 9; Other Information: (c) 2015 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; CARBON DIOXIDE; COBALT COMPOUNDS; ELECTRIC CONTACTS; HEUSLER ALLOYS; IRON COMPOUNDS; MAGNETIC FIELDS; MAGNETORESISTANCE; MANGANESE SILICIDES; MHZ RANGE; OSCILLATIONS; SPIN ORIENTATION; TORQUE