Mechanism of elastic softening behavior in a superlattice

• Nakamura, Nobutomo

• Ogi, Hirotsugu

• Yasui, Takeshi

• Fujii, Makoto

• Hirao, Masahiko

Abstract

Nakamura N., Ogi H., Yasui T., et al. "Mechanism of elastic softening behavior in a superlattice", Physical Review Letters, 99(3), 035502, 2007. https://doi.org/10.1103/PhysRevLett.99.035502.

We measured the out-of-plane elastic constants C33 of a Co/Pt superlattice by picosecond ultrasound, and found that they were closely related to the thickness ratio of Co and Pt layers; C33 was smaller than the prediction from the bulk values except for a specific thickness ratio. This behavior can be explained by the weak bonding at the interfaces that occurs to reduce the elastic strain energy, not by the interfacial strain. This view explained the relationship among C33, the elastic strain energy, and perpendicular magnetic anisotropy. © 2007 The American Physical Society.

Journal

• Physical Review Letters

  Physical Review Letters 99 (3), 035502-1-035502-4, 2007-07-19

  American Physical Society

Details

• CRID: 1050581168900563584
• NII Article ID: 120007148355
• NII Book ID: AA11734748
• ISSN: 10797114
• ISSN: 00319007
• HANDLE: 11094/84183
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles