Large amplitude spin torque vortex oscillations at zero external field using a perpendicular spin polarizer

Journal Article · Mon Jul 14 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4885537· OSTI ID:22311084

Dussaux, A.; Rache Salles, B.; Jenkins, A. S.; Bortolotti, P.; Grollier, J.; Cros, V.; Fert, A. ^[1]; Khvalkovskiy, A. V. ^[1]; Kubota, H.; Fukushima, A.; Yakushiji, K.; Yuasa, S. ^[2]

---

1. Unité Mixte de Physique CNRS/Thales and Université Paris Sud 11, 1 Ave. A. Fresnel, 91767 Palaiseau (France)
2. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)

We investigate the microwave response of a spin transfer vortex based oscillator in a magnetic tunnel junction with an in-plane reference layer combined with a spin valve with an out-of-plane magnetization spin polarizing layer. The main advantage of this perpendicular spin polarizer is to induce a large spin transfer force even at zero magnetic field, thus leading to a record emitted power (up to 0.6 μW) associated to a very narrow spectral linewidth of a few hundreds of kHz. The characteristics of this hybrid vortex based spin transfer nano-oscillator obtained at zero field and room temperature are of great importance for applications based on rf spintronic devices as integrated and tunable microwave source and/or microwave detector.

• OSTI ID: 22311084
• Journal Information: Applied Physics Letters, Vol. 105, Issue 2; 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
AMPLITUDES
EMISSION
LAYERS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MICROWAVE RADIATION
OSCILLATIONS
OSCILLATORS
SPIN ORIENTATION
TORQUE
TUNNEL DIODES
TUNNEL EFFECT
VORTICES