Magnetic phase transitions in epitaxial Fe/Cr superlattices

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Fe/Cr superlattices exhibit a variety of intriguing magnetic properties not observed in bulk materials. Examples include oscillatory interlayer coupling and giant magnetoresistance. Growth of epitaxial superlattices allows the interlayer coupling and magnetic anisotropy to be tailored to probe rather subtle magnetic ordering transitions of thin-film antiferromagnets. The author discusses two such transitions, the surface spin-flop transition in Fe/Cr(211) superlattices and the Neel transition of thin Cr layers in proximity with Fe in Fe/Cr(001) superlattices. The surface spin-flop transition is a first-order, field-induced phase transition in antiferromagnets with uniaxial magnetic anisotropy and the field applied along the easy direction. In Fe/Cr(100) ... continued below

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5 p.

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Fullerton, E.E. July 1, 1995.

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  • Fullerton, E.E. Argonne National Lab., IL (United States). Materials Science Div.

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Description

Fe/Cr superlattices exhibit a variety of intriguing magnetic properties not observed in bulk materials. Examples include oscillatory interlayer coupling and giant magnetoresistance. Growth of epitaxial superlattices allows the interlayer coupling and magnetic anisotropy to be tailored to probe rather subtle magnetic ordering transitions of thin-film antiferromagnets. The author discusses two such transitions, the surface spin-flop transition in Fe/Cr(211) superlattices and the Neel transition of thin Cr layers in proximity with Fe in Fe/Cr(001) superlattices. The surface spin-flop transition is a first-order, field-induced phase transition in antiferromagnets with uniaxial magnetic anisotropy and the field applied along the easy direction. In Fe/Cr(100) superlattices, the antiferromagnetic ordering of the Cr spacers results in anomalies in a variety of physical properties. The transition temperature is strongly Cr thickness dependent. A `transition-temperature shift exponent` is extracted from the data in the thick Cr regime (< 160 {angstrom}) and discussed in terms of a combination of finite-size and spin-frustration effects.

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5 p.

Notes

OSTI as DE95013737

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  • 18. Brazilian meeting on condensed matter physics, Sao Paulo (Brazil), 6-10 Jun 1995

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  • Other: DE95013737
  • Report No.: ANL/MSD/CP--86639
  • Report No.: CONF-9506224--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 95232
  • Archival Resource Key: ark:/67531/metadc794131

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  • July 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 6, 2016, 2:24 p.m.

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Fullerton, E.E. Magnetic phase transitions in epitaxial Fe/Cr superlattices, article, July 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc794131/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.