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This first focused treatment on a hot topic highlights fundamental aspects as well as technological applications arising from a fascinating area of condensed matter physics. The editors have excellent track records and, in light of the broadness of the topic, retain the focus on antiferromagnetic oxides. They thus cover such topics as dichroism in x-ray absorption, non-magnetic substrates, exchange bias, ferromagnetic-antiferromagnetic interface coupling and oxide multilayers, as well as imaging using soft x-ray microscopy.The result is a very timely monograph for solid state physicists and chemists, materials scientists, electrical engineers, physicists in industry, physical laboratory technicians, and suppliers of sensors.
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Edited by Lamberto Du`o, Marco Finazzi, and Franco Ciccacci Magnetic Properties of Antiferromagnetic Oxide Materials
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Edited by Lamberto Du`o, Marco Finazzi, and Franco Ciccacci
Magnetic Properties of Antiferromagnetic Oxide Materials Surfaces, Interfaces, and Thin Films
The Editors Lamberto Du`o Marco Finazzi Franco Ciccacci Dipartimento di Fisica Politecnico di Milano 20133 Milano Piazza Leonardo DA Vinci 32 Italy
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All rights reserved (including those of translation into other languages). No part of this book may be reproduced in any form – by photoprinting, microfilm, or any other means – nor transmitted or translated into a machine language without written permission from the publishers. Registered names, trademarks, etc. used in this book, even when not specifically marked as such, are not to be considered unprotected by law. Cover Design Adam Design, Weinheim Typesetting Laserwords Private Limited, Chennai, India Printing and Binding Strauss GmbH, Mo¨ rlenbach Printed in the Federal Republic of Germany Printed on acid-free paper ISBN: 978-3-527-40881-8
V
Contents
Preface XI List of Contributors
XV
1
Low-Dimensional Antiferromagnetic Oxides : An Overview Marco Finazzi, Lamberto Du`o, and Franco Ciccacci
1.1 1.2 1.3 1.3.1 1.3.2 1.4 1.4.1 1.4.2 1.5 1.6 1.7
Introduction 1 Finite-Size Effects on the Magnetic Ordering Temperature 2 AFM Anisotropy 6 Magnetocrystal Anis