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Author: Christian Binek Publisher: Springer Science & Business Media ISBN: 9783540404286 Category : Science Languages : en Pages : 138
Book Description
Selected modern aspects of artificially layered structures and bulk materials involving antiferromagnetic long-range order are the main themes of this book. Special emphasis is laid on the prototypical behavior of Ising-type model systems. They play a crucial role in the field of statistical physics and, in addition, contribute to the basic understanding of the exchange bias phenomenon in MBE-grown magnetic heterosystems. Throughout the book, particular attention is given to the interplay between experimental results and their theoretical description, ranging from the famous Lee-Yang theory of phase transitions to novel mechanisms of exchange bias.
Author: Christian Binek Publisher: Springer Science & Business Media ISBN: 9783540404286 Category : Science Languages : en Pages : 138
Book Description
Selected modern aspects of artificially layered structures and bulk materials involving antiferromagnetic long-range order are the main themes of this book. Special emphasis is laid on the prototypical behavior of Ising-type model systems. They play a crucial role in the field of statistical physics and, in addition, contribute to the basic understanding of the exchange bias phenomenon in MBE-grown magnetic heterosystems. Throughout the book, particular attention is given to the interplay between experimental results and their theoretical description, ranging from the famous Lee-Yang theory of phase transitions to novel mechanisms of exchange bias.
Author: Publisher: ISBN: Category : Languages : en Pages : 123
Book Description
A spin glass is a magnetic ground state in which ferromagnetic and antiferromagnetic exchange interactions compete, thereby creating frustration and a multidegenerate state with no long range order. An Ising system is a system where the spins are constrained to lie parallel or antiparallel to a primary axis. There has been much theoretical interest in the past ten years in the effects of applying a magnetic field transverse to the primary axis in an Ising spin glass at low temperatures and thus study phase transitions at the T=0 limit. The focus of this study is to search for and characterize a new Ising spin glass system. This is accomplished by site diluting yttrium for terbium in the crystalline material TbNi2Ge2. The first part of this work gives a brief overview of the physics of rare earth magnetism and an overview of experimental characteristics of spin glasses. This is followed by the methodology used to manufacture the large single crystals used in this study, as well as the measurement techniques used. Next, a summary of the results of magnetic measurements on across the dilution series from pure terbium to pure yttrium is presented. This is followed by detailed measurements on particular dilutions which demonstrate spin glass behavior. Pure TbNi2Ge2 is an Ising antiferromagnet with a several distinct metamagnetic states below 17 K. As the terbium is alloyed with yttrium, these magnetic states are weakened in a consistent manner, as is seen in measurements of the transition temperatures and analysis of Curie-Weiss behavior at high temperature. At low concentrations of terbium, below 35%, long range order is no longer present and a spin-glass-like state emerges. This state is studied through various measurements, dc and ac susceptibility, resistivity, and specific heat. This magnetic behavior was then compared to that of other well characterized spin glasses. It is concluded that there is a region of concentration s for which a spin glass state is formed with the best spin glasses existing between the concentration of 25% and 30%.
Author: Amikam Aharoni Publisher: Oxford University Press, USA ISBN: Category : History Languages : en Pages : 336
Book Description
This introductory textbook explains the basic theoretical principles of magnetism, providing a broad coverage of the subject and indicating directions of future research. While the book is meant primarily as a textbook for first-year graduate students and advanced undergraduates in physics and engineering, it can also be a reference for practicing engineers and physicists who work in the field of magnetism. It explains the basic theoretical principles on which much of this type of research is based, with special attention to some of the shortcomings and drawbacks. The book emphasizes the foundations of different subfields, but also explores the directions of the most recent research.
Author: Christian Binek
Author: Christian Binek
Author: Christian Binek
Author: 
Author: Norikazu Ishimura
Author: Peter David Roberts
Author: Hironobu Ikeda
Author: David Paul Landau
Author: Andrea Farkas
Author: Douglas A. Harrington
Author: Amikam Aharoni