Antiferromagnetism in an oxide semiconducting glass

✍ Scribed by E. J. Friebele; L. K. Wilson; A. W. Dozier; D. L. Kinser

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 524 KB
• Volume: 45
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220450137

✦ Synopsis

Abstract

The magnetic structure of a 55 mol% FeO–45 mol% P~2~O~5~ semiconducting glass containing various relative concentrations of Fe^3+^ and Fe^2+^ has been studied by ESR techniques over the temperature range −190 to 300 °C. It was determined that the iron ions in the glass matrix are antiferromagnetically coupled in Fe^3+^–Fe^2+^ ion pairs. The isolated Fe^3+^−Fe^2+^ ion pairs. The isolated Fe^3+^ ions were found to be in orthorhombic crystalline fields with λ = 1/3 and 0.23 < D < 0.8 cm^−1^, where D and λ are constants in the spin Hamiltonian. Heat treatment of the glass samples caused precipitation of Fe^3+^‐rich crystalline phases, and it was determined that the Fe^3+^ ions in these phases were antiferromagnetically aligned.