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Seminar - LMGP - 19/01/2017 - Panagiotis Poulopoulos

Published on January 10, 2017
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Seminar January 19, 2017
Grenoble INP - Phelma
Laboratoire LMGP
3 parvis Louis Néel - 38000 Grenoble
Accès : TRAM B arrêt Cité internationale
Free entrance - No registration
10:00 h - 2ème étage - salle de séminaire

Natural magnetic multilayers: Growth and Magnetism

Panagiotis Poulopoulos

University of Patras, départment of Marerials Science
Greece
 

 

Abstract

Nowadays, there is an increasing interest in the study of magnetic multilayers with very thin oxide layers for applications such as spintronics and magnetic / magneto-optical recording. In this work we present a simple method to fabricate high quality multilayers with the use of a single magnetron sputtering head operating in ultrahigh vacuum (5x10-8 mbar). Namely, at the end of the deposition of each single Ni or Co layer, air is let into the chamber through a fine leak valve. Then a very thin NiO or CoO layer (~ 1.5 nm) is formed by natural oxidation. The process is repeated and the result is the formation of multilayers with excellent layering. Here we will review the structural and magnetic properties. The Ni/NiO multilayers show positive interface anisotropy and tendency for perpendicular magnetic anisotropy, while, for the Co/CoO ones, inverted hysteresis loops are recorded. 


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Date of update January 10, 2017

Univ. Grenoble Alpes