Magnetoresistive element and memory element
First Claim
1. A magnetoresistive element comprising a polarizable light source, a semiconductor portion capable of spin polarization of electrons by light excitation using the light source, a magnetic film portion, and electrode portions arranged on the semiconductor portion and the magnetic film portion respectively.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetoresistive effect element having a large magnetoresistive change with a small magnetic field, and a memory element using the same. A semiconductor film to provide a window for excitation light is arranged on a substrate via a buffer layer. Another semiconductor film and a nonmagnetic metallic film (or a nonmagnetic insulating film) are arranged on the semiconductor film successively. A magnetic film having a square magnetization curve is arranged on the nonmagnetic metallic film (or a nonmagnetic insulating film). An electrode is arranged beneath the substrate and another electrode is arranged on the magnetic film. By radiating a laser light beam to the semiconductor film acting as a window, electrons having spin polarization are excited in the semiconductor film so as to utilize the dependency of the scattering of electrons at the surface of the magnetic film on the magnetization orientation of the magnetic film and the spin polarization state of the excited electrons.
130 Citations
23 Claims
- 1. A magnetoresistive element comprising a polarizable light source, a semiconductor portion capable of spin polarization of electrons by light excitation using the light source, a magnetic film portion, and electrode portions arranged on the semiconductor portion and the magnetic film portion respectively.
- 12. A memory element comprising a polarizable light source, a semiconductor portion capable of spin polarization of electrons by light excitation using the light source, a magnetic film portion having a square magnetization curve contacting to the semiconductor portion, a conductor line portion for reading out information contacting both to the semiconductor portion and the magnetic film portion, and a conductor line portion for recording information arranged in the vicinity of the magnetic film portion via an insulating film.
Specification