skip to main content

Title: Dramatic impact of the giant local magnetic fields on spin-dependent recombination processes in gadolinium based garnets

A giant magnetic field effect on spin-dependent recombination of the radiation-induced defects has been found in cerium doped gadolinium based garnet crystals and ceramics, promising materials for scintillator applications. A sharp and strong increase in the afterglow intensity stimulated by external magnetic field and an evidence of the magnetic field memory have been discovered. The effect was ascribed to huge Gd-induced internal magnetic fields, which suppress the recombination, and cross-relaxation with Gd{sup 3+} ions leading to reorientation of the spins of the electron and hole centers. Thus, the spin system of radiation-induced defects in gadolinium garnet based scintillator materials was shown to accumulate significant energy which can be released in external magnetic fields.
Authors:
; ; ; ; ;  [1] ;  [1] ;  [2] ; ;  [3]
  1. Ioffe Institute, St. Petersburg 194021 (Russian Federation)
  2. (Russian Federation)
  3. Philips Research, High Tech Campus 34, 5656 AE Eindhoven (Netherlands)
Publication Date:
OSTI Identifier:
22483119
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 26; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AFTERGLOW; CERAMICS; CERIUM; CRYSTALS; DOPED MATERIALS; ELECTRONS; GADOLINIUM; GADOLINIUM IONS; GARNETS; HOLES; MAGNETIC FIELDS; RECOMBINATION; RELAXATION; SPIN