Direct observation of oscillatory interlayer exchange coupling in sputtered wedges using circularly polarized x rays
Creators
- 1. IBM Research Division, Almaden Research Center, San Jose, California 95120-6099 (United States)
- 2. IBM San Jose, San Jose, California 95153 (United States)
- 3. Synchrotron Radiation Center, University of Wisconsin-Madison, Stoughton, Wisconsin 53589 (United States)
Description
Oscillations in the magnetic exchange coupling between two ferromagnetic layers separated by Ru are directly observed in magnetron sputtered wedged sandwiches using x-ray magnetic circular dichroism. The magnetization of the lower magnetic layer in the sandwich is saturated in zero field by exchange biasing it to an antiferromagnetic layer of Fe60Mn40. The oscillatory exchange coupling through the Ru wedge causes the direction of the magnetic moment of the upper magnetic layer to rotate back and forth along the wedge and this is directly observed from variations in the intensity of absorption of circularly polarized x rays. Five oscillations in absorption intensity with a period corresponding to congruent 11 A were observed in a Ni81Fe19/Ru/Ni70Co30 wedge
Additional details
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 63
- Journal Issue
- 2
- Journal Page Range
- p. 263-265.
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24071622
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BINARY ALLOY SYSTEMS; COBALT ALLOYS; DICHROISM; EXCHANGE INTERACTIONS; IRON ALLOYS; MAGNETISM; NICKEL BASE ALLOYS; OSCILLATIONS; RUTHENIUM; SUPERLATTICES; SYNCHROTRON RADIATION; THICKNESS; X-RAY SPECTROSCOPY
- Descriptors DEC
- ALLOY SYSTEMS; ALLOYS; BREMSSTRAHLUNG; DIMENSIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; INTERACTIONS; METALS; NICKEL ALLOYS; PLATINUM METALS; RADIATIONS; SPECTROSCOPY; TRANSITION ELEMENTS