• Rapid Communication

Role of the nonmagnetic layer in determining the Landé g-factor in a spin-transfer system

J.-S. Lee, E. Vescovo, C.-C. Kao, J.-M. Beaujour, A. D. Kent, H. Jang, J.-Y. Kim, J.-H. Park, and J. H. Shim
Phys. Rev. B 80, 180403(R) – Published 2 November 2009

Abstract

The microscopic origin of the Landé g-factor in two ferromagnetic/nonmagnetic (FM/NM) bilayer systems-Co/Cu and Ni/Pd-has been investigated using x-ray magnetic circular dichroism, resonant magnetic reflectivity, and band calculations. The FM/NM bilayer represents the building block of any complete spin-transfer structure (FM1/NM/FM2). The valence electronic structure is profoundly altered over a finite length across the FM/NM interface. A considerable charge transfer takes place from the NM to the FM material. This results in an enhancement of the orbital-to-spin magnetic moment ratio in the FM layer and an induced magnetic polarization in the NM layer. Both effects turn out to be crucial for a correct understanding of the g-factor in spin-transfer systems.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 18 September 2009

DOI:https://doi.org/10.1103/PhysRevB.80.180403

©2009 American Physical Society

Authors & Affiliations

J.-S. Lee1, E. Vescovo1, C.-C. Kao1, J.-M. Beaujour2, A. D. Kent2, H. Jang3, J.-Y. Kim3, J.-H. Park3, and J. H. Shim4

  • 1National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA
  • 3Department of Physics and PAL, Pohang University of Science and Technology, Pohang 790-784, South Korea
  • 4Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, South Korea

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 80, Iss. 18 — 1 November 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×