Exchange spin current

E. Saitoh, K. Ando

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter introduces the concept of exchange spin current, which derives from rewriting the exchange interaction in magnets and formulating a spin-wave spin current. States of matter can be classified into several types in terms of magnetic properties. In paramagnetic and diamagnetic states, matter has no magnetic order and exhibits zero magnetization in the absence of external magnetic fields. In ferromagnetic states, the permanent magnetic moments of atoms or ions align parallel to a certain direction, and the matter exhibits finite magnetization even in the absence of external magnetic fields. In ferrimagnets, the moments align antiparallel but the cancellation is not perfect and net magnetization appears. This interaction that aligns spins is called the exchange interaction.

Original languageEnglish
Title of host publicationSpin Current
PublisherOxford University Press
Pages22-29
Number of pages8
ISBN (Print)9780198787075
DOIs
Publication statusPublished - 2017 Dec 21

Keywords

  • Exchange interaction
  • Exchange spin current
  • Magnetic properties
  • Magnetization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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