Thermoelectrical manipulation of nano-magnets : A spin-thermionic oscillator

• We investigate the interplay between the thermodynamic properties and spin-dependent transport in a mesoscopic magnetic multilayer, in which two strongly ferromagnetic layers are exchange-coupled through a weakly ferromagnetic spacer. We show theoretically that the system allows a spin-thermoelectronic control of the relative orientation of the outer layers. Supporting experimental evidence of thermally controlled switching from parallel to anti-parallel magnetization orientations in the sandwich is presented. We show magneto-resistance oscillations may take place with frequencies up to GHz. We discuss in detail an experimental realization of a device that can operate as a thermo-magneto-resistive switch or oscillator.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Annan teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies (hsv//eng)

Nyckelord

Thermionics

Controlled switching

Experimental evidence

Ferromagnetic layers

Magnetization orientation

Mesoscopics

Nanomagnets

Outer layer

Relative orientation

Spin dependent transport

Ferromagnetic materials

Ferromagnetism

Magnetic field effects

Magnetic multilayers

Magnetoresistance

Nanotechnology

Magnetos

spintronics

oscillator

magneto-resistance

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