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Thayer GE, Ozolins V, Schmid AK, et al. Role of stress in thin film alloy thermodynamics: competition between alloying and dislocation formation. Phys Rev Lett. 2001;86(4):660-3doi: 10.1103/PhysRevLett.86.660.
Thayer, G. E., Ozolins, V., Schmid, A. K., Bartelt, N. C., Asta, M., Hoyt, J. J., Chiang, S., & Hwang, R. Q. (2001). Role of stress in thin film alloy thermodynamics: competition between alloying and dislocation formation. Physical review letters, 86(4), 660-3. https://doi.org/10.1103/PhysRevLett.86.660
Thayer, G E, et al. "Role of stress in thin film alloy thermodynamics: competition between alloying and dislocation formation." Physical review letters vol. 86,4 (2001): 660-3. doi: https://doi.org/10.1103/PhysRevLett.86.660
Thayer GE, Ozolins V, Schmid AK, Bartelt NC, Asta M, Hoyt JJ, Chiang S, Hwang RQ. Role of stress in thin film alloy thermodynamics: competition between alloying and dislocation formation. Phys Rev Lett. 2001 Jan 22;86(4):660-3. doi: 10.1103/PhysRevLett.86.660. PMID: 11177906.
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Phys Rev Lett. 2001 Jan 22;86(4):660-3. doi: 10.1103/PhysRevLett.86.660.

Role of stress in thin film alloy thermodynamics: competition between alloying and dislocation formation.

Physical review letters

G E Thayer, V Ozolins, A K Schmid, N C Bartelt, M Asta, J J Hoyt, S Chiang, R Q Hwang

Affiliations

  1. Sandia National Laboratories, Livermore, California 94551, USA.

PMID: 11177906 DOI: 10.1103/PhysRevLett.86.660

Abstract

Using scanning tunneling microscopy (STM) and first-principles local-spin-density-approximation calculations to study submonolayer films of Co (1-c)Ag (c)/Ru(0001) alloys, we have discovered a novel phase-separation mechanism. When the Ag concentration c exceeds 0.4, the surface phase separates between a dislocated, pure Ag phase and a pseudomorphically strained Co(0.6)Ag (0.4) surface alloy. We attribute the phase separation to the competition between two stress relief mechanisms: surface alloying and dislocation formation. The agreement between STM measurements and our calculated phase diagram supports this interpretation.

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