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Magnetism and Magnetic Measurement, Introduction

Magnetism and Magnetic Measurement

  1. C. L. Chien

Published Online: 12 OCT 2012

DOI: 10.1002/0471266965.com040.pub2

Characterization of Materials

Characterization of Materials

How to Cite

Chien, C. L. 2012. Magnetism and Magnetic Measurement, Introduction. Characterization of Materials. 1–5.

Author Information

  1. Johns Hopkins University, Baltimore, MD, USA

Publication History

  1. Published Online: 12 OCT 2012

Abstract

Magnetism and magnetic materials have a long and illustrious history from antiquity to the present. Devices and technologies based on magnetism, from loadstone in the ancient, to the spin-valve GMR read-heads in our computers now, to the new memories (e.g., STT-MRAM) in the future, may be the longest running technology in human endeavor. A fundamental understanding of magnetism requires quantum mechanics and special relativity that have been advanced in the 20th century. In this Chapter, we describe the origin of the atomic magnetic moments, their mutual interaction that leads to magnetism, the generation of magnetic field, and the exploitation of magnetic materials for technological applications.

Keywords:

  • magnetism;
  • magnetic measurements;
  • paramagnetism;
  • dimagnetism;
  • antiferromagnetism;
  • ferromagnetism