Annual Letter Report for Contract N00014-87-K-0338 (University of California,San Diego Department of Physics)
Abstract
The technical reports discussed a new approach suggested to utilize electron paramagnetic resonance (EPR) as a probe of electron transport across the silicon-metal interface. The second investigation is of important properties of the copper-oxide high T sub c superconductors. The first problem, discussed the special P-doped silicon samples, developed techniques for maintaining an atomically clean silicon surface in UHV without high temperature processing, and provided the proof of concept for samples made in UHV but, of necessity, measured in a separate EPR apparatus. The investigation of copper-oxide superconductivity completed detailed investigations into the magnetic properties of single crystals of the family R2CuO4(R=Pr, Nd, Sm, Eu, or Gd). This system has been shown to become superconducting when doped with Ce or Th. It is particularly interesting because the Cu-O is purely planar and is claimed to have electron conductivity. The complex magnetic behavior observed, which includes antiferromagnetic transitions, weak ferromagnetism, anomalous anisotropy, spin canting, and spontaneous spin reorientation is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 1989
- Accession Number
- ADA213833
Entities
People
- Sheldon Schultz
Organizations
- University of California, San Diego