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Spiraling spin structure in an exchange-coupled antiferromagnetic layer

Yang1, Chien

  • 1Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USA.

Physical Review Letters
|September 8, 2000
PubMed
Summary

Researchers found a spiraling spin structure in antiferromagnetic manganese-iron (FeMn) layers within permalloy/FeMn/Co trilayers. The spin structure

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spintronics

Background:

  • Antiferromagnetic materials are crucial in spintronics for memory and logic devices.
  • Understanding spin structures in antiferromagnets is key to controlling their magnetic properties.

Purpose of the Study:

  • To investigate the presence and characteristics of spin structures in antiferromagnetic FeMn layers.
  • To determine the relationship between FeMn layer thickness and spin structure behavior.

Main Methods:

  • Fabrication of permalloy/FeMn/Co trilayer structures with varying FeMn thicknesses (t(AF)).
  • Experimental observation and analysis of spin structures within the FeMn layers.

Main Results:

  • Evidence of a spiraling spin structure was observed within the FeMn layers.
  • For FeMn thicknesses below 90 Angstroms, the spiral turn angle (θ) showed a linear dependence on thickness: θ = (1.76°/Å)t(AF).

Conclusions:

  • The study confirms the existence of a spiraling spin structure in thin antiferromagnetic FeMn layers.
  • The observed linear relationship provides a quantitative understanding of spin structure formation in these trilayers, relevant for spintronic applications.

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