Effects of high pressure on tunnel transport and magnetoresistance have been investigated in Co52Al20O28 insulating granular films. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure while the T−1/2 dependence in ρ(T) is still observed at high pressures. Furthermore, tunnel magnetoresistance is enhanced by more than 2% at 3.1 GPa. The results are discussed briefly on the basis of higher-order tunneling theory.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2003 Aug 5|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics