Role of the nonmagnetic layer in determining the Lande g-factor in a spin transfer system
The microscopic origin of the Lande 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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1041138
- Report Number(s):
- BNL-90956-2010-JA; R&D Project: LS001; KC0204011; TRN: US201211%%443
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 80, Issue 18; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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