Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices
Abstract
We have studied the magnetoresistance of (001)Fe/(001)Cr superlattices prepared by molecular-beam epitaxy. A huge magnetoresistance is found in superlattices with thin Cr layers: For example, with tCr=9 Å, at T=4.2 K, the resistivity is lowered by almost a factor of 2 in a magnetic field of 2 T. We ascribe this giant magnetoresistance to spin-dependent transmission of the conduction electrons between Fe layers through Cr layers.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 1988
- DOI:
- 10.1103/PhysRevLett.61.2472
- Bibcode:
- 1988PhRvL..61.2472B
- Keywords:
-
- 75.50.Rr;
- 72.15.Gd;
- 75.70.Cn;
- Galvanomagnetic and other magnetotransport effects;
- Magnetic properties of interfaces