Nanocrystalline Permanent Magnets with Enhanced Properties

• Authors: M. Leonowicz
• Languages of publication: EN

Abstracts

EN

Parameters of permanent magnets result from the combination of intrinsic properties such as saturation magnetization, magnetic exchange, and magnetocrystalline energy, as well as microstructural parameters such as phase structure, grain size, and orientation. Reduction of the grain size into nanocrystalline regime (≈50 nm) leads to the enhanced remanence which derives from ferromagnetic exchange coupling between highly refined grains. In this study the fundamental phenomena, quantities, and structure parameters, which define nanophase permanent magnets are presented and discussed. The theoretical considerations are confronted with experimental data for nanocrystalline Sm-Fe-N type permanent magnets.

Keywords

EN

75.50.-y; 75.60.-d; 75.75.+a

Discipline

• 75.60.-d: Domain effects, magnetization curves, and hysteresis(for dynamics of domain structures, see 75.78.Fg)
• 75.50.-y: Studies of specific magnetic materials

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 102
• Issue: 1
• Pages: 35-43

Dates

published

2002-07

received

2001-09-23

Contributors

author

M. Leonowicz

• Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland

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Identifiers

DOI

10.12693/APhysPolA.102.35