Structural and magnetic ordering in nanoparticles of complex 3d- and 4f-element oxides in germanate glass

• Published in: Bulletin of the Russian Academy of Sciences. Physics Vol. 73; no. 7; pp. 968 - 970
• Main Authors: Edelman, I. S., Ivanova, O. S., Zabluda, V. N., Velikanov, D. A., Zaikovskii, V. I., Stepanov, S. A., Petrakovskaya, E. A., Ivantsov, R. D.
• Format: Journal Article
• Language: English
• Published: Heidelberg Allerton Press, Inc 01-07-2009; Springer Nature B.V
• Subjects: Clusters; Crystal structure; Dysprosium; Faraday effect; Glass; Hadrons; Heavy Ions; Magnetic saturation; Nanoparticles; Nuclear Physics; Oma-11; Oxides; Physics; Physics and Astronomy; Rare earth elements; Initial Glass; Magnetic Circular Dichroism; High Resolu Tion Transmission Electron Microscopy; Electron Magnetic Resonance; Faraday Rotation
• ISSN: 1062-8738; 1934-9432
• DOI: 10.3103/S1062873809070338

Germanate glasses doped simultaneously with Fe and rare earth elements Gd, Tb, Dy, and Ho in concentrations of several percent have been investigated. It is shown that the phase state of paramagnetic elements changes from isolated ions and small clusters in the initial glass to crystalline magnetic nanoparticles in the samples subjected to heat treatments. The field dependences of the magnetization of such samples are characterized by magnetic saturation in fields of about 1 kOe and large Faraday rotation in the near-IR region (up to 10 deg/cm in the range from 700 to 800 nm).