Exchange bias as a probe of the incommensurate spin-density wave in epitaxial Fe/Cr(001)

J. S. Parker, L. Wang, K. A. Steiner, P. A. Crowell, C. Leighton

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Abstract

We report clear multiple period oscillations in the temperature dependence of exchange bias in an Fe thin film exchange coupled to a neighboring Cr film. The oscillations arise due to an incommensurate spin-density wave in the Cr, with wave vector perpendicular to the Fe/Cr(001) interface. The exchange bias and coercivity allow for a determination of the extent of the thermally driven wavelength expansion, the (strain-suppressed) spin-flip transition temperature, and the Cr Néel temperature, which show a crossover from bulklike to finite-size behavior at a Cr thickness of ∼1100. The data are consistent with a transition from a transverse to longitudinal wave on cooling.

Original languageEnglish (US)
Article number227206
JournalPhysical Review Letters
Volume97
Issue number22
DOIs
StatePublished - Dec 8 2006

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oscillations
probes
longitudinal waves
coercivity
crossovers
transition temperature
cooling
temperature dependence
expansion
thin films
wavelengths
temperature

Cite this

Exchange bias as a probe of the incommensurate spin-density wave in epitaxial Fe/Cr(001). / Parker, J. S.; Wang, L.; Steiner, K. A.; Crowell, P. A.; Leighton, C.

In: Physical Review Letters, Vol. 97, No. 22, 227206, 08.12.2006.

Research output: Contribution to journalArticle

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