DSM : Thesis SL-DSM-15-0439

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Research field

Solid state physics, surfaces and interfaces / Solid state physics, chemistry and nanosciences
Solid state physics, surfaces and interfaces / Solid state physics, chemistry and nanosciences

Title

Exploring the non-linear magnetization dynamics in a coupled magnetic layer system for microwave applications

Abstract

One of the basic concepts of spintronics is the spin momentum transfer where spin polarized conduction electrons can transfer a magnetic moment to the magnetization of a thin magnetic film. This magnetic momentum transfer is responsible for the excitation of high frequency (Gigahertz range) magnetization oscillations and opens new possibilities for the development of integrated radio frequency oscillators. SPINTEC develops and studies the autonomous and non-autonomous operation of such spintronic oscillators (STOs) from a fundamental point of view but also in context of possible applications. A current important question considers how the spin momentum transfer driven dynamics interacts with other excitations of the spintronics nanodevice that can influence for instance the frequency characteristics and overall RF performances.

While standard spintronics oscillators are made of a polariser (to spin polarise the current) and a free layer (in which the dynamics is excited by spin momentum transfer), novel structures consider magnetic multilayers made of several (more than two) magnetic thin layers, separated by a non-magnetic layer. Here each layer is supposed to spin polarise the current and to be excited at the same time. The objective of the thesis is to study spin polarised collective excitations coupled via spin momentum transfer, dipolar field and exchange interaction.

The thesis work is mainly experimental using high frequency measurements techniques. However, analyis of the data requires to realize numerical simulations. The student will also contribute to the device realization (optimization of materials deposition and nanofabrication).

Location

Institut nanosciences et cryogénie
Spintronique et technologie des composants
Laboratoire Spintec
Centre : Grenoble
Starting date : 01/10/2015

Contact person

Olivier KLEIN
CEA / DSM/INAC/SPINTEC/SPINTEC
CEA-Grenoble

17 rue des Martyrs

38054 GRENOBLE Cedex 9




Phone : 04 38 78 58 02

More about

http://www.spintec.fr/

University / Graduate School

Grenoble I (UJF)
Ecole Doctorale de Physique de Grenoble

Thesis supervisor

Ursula Ebels
CEA / DSM/INAC/SPINTEC/SPINTEC
17 rue des martyrs

38054 Grenoble



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