Magnetoelectric Response in Low-Dimensional Frustrated Spin Systems

1. Front Matter

   Pages i-xi

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2. Introduction

   • Shinichiro Seki

   Pages 1-13

3. Experimental Methods

   • Shinichiro Seki

   Pages 15-23

4. Magnetoelectric Response in Triangular Lattice Antiferromagnets

   • Shinichiro Seki

   Pages 25-83

5. Magnetoelectric Response in \(S=1/2\) Chain Helimagnets

   • Shinichiro Seki

   Pages 85-104

6. Summary

   • Shinichiro Seki

   Pages 105-109

7. Back Matter

   Pages 111-112

   PDF

Electric control of magnetic properties, or inversely, magnetic control of dielectric properties in solids, is called a magnetoelectric effect and has long been investigated from the point of view of both fundamental physics and potential application. Magnetic and dielectric properties usually show minimal coupling, but it recently has been discovered that magnetically induced ferroelectricity in some spiral magnets enables remarkably large and versatile magnetoelectric responses. To stabilize such helimagnetism, magnetic frustration (competition between different magnetic interactions) is considered the key. In the present work, two of the most typical frustrated spin systems—triangular lattice antiferromagnets and edge-shared chain magnets—have systematically been investigated. Despite the crystallographic simplicity of target systems, rich magnetoelectric responses are ubiquitously observed. The current results published here offer a useful guideline in the search for new materials with unique magnetoelectric functions, and also provide an important basis for a deeper understanding of magnetoelectric phenomena in more complex systems.

• Magnetic frustration
• Magnetoelectric effect
• Multiferroics
• Spintronics
• Strongly correlated electron
• edge-shared chain magnets
• frustrated spin systems
• magnetically-induced ferroelectricity
• triangular lattice antiferromagnets

• Tokyo, Japan

  Shinichiro Seki

Dr. Shinichiro Seki
Department of Applied Physics, University of Tokyo

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