Microwave and magneto-optic properties of ϵ-Fe2O3 nanoparticles arising in borate glasses doped with Fe and Gd

Описание

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: Moscow International Symposium on Magnetism (MISM); Lomonosov Moscow State Univ, Fac Phys, Moscow, RUSSIA; Lomonosov Moscow State Univ, Fac Phys, Moscow, RUSSIA

Год издания: 2018

Идентификатор DOI: 10.1051/epjconf/201818503011

Аннотация: The ϵ-Fe2O3 nanoparticles in borate glasses co-doped with low concentrations of Fe2O3 and Gd2O3 were investigated with two experimental techniques-visible magnetic circular dichroism (MCD) and electron spin resonance (ESR). The most prominent features of the MCD spectra are: non-linear dependence of the spectral maxima intensities Показать полностьюon the Gd concentration and strong increase with the temperature decrease. The ESR spectra of these glasses exhibit two features with g = 4.3 due to the diluted Fe3+ ions and 2.0 associated both with Fe3+ ions and with nanoparticles. The integrated spectra intensities do not follow the T-1 Curie law suggesting a considerable contribution from the magnetically ordered nanoparticles to ESR. Analysis of the MCD and ESR concentration dependences allow suggestion on the Gd ions incorporation into nanoparticles. © 2018 The Authors, published by EDP Sciences.

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Издание

Журнал: EPJ Web of Conferences

Выпуск журнала: Vol. 185

Издатель: 2017 Moscow International Symposium on Magnetism, MISM 2017

Авторы

  • Ivanova Oxana (FRC KSC RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660036, Russia)
  • Kliava Janis (Univ Bordeaux 1, LOMA, UMR 5798, CNRS, F-33405 Talence, France)
  • Edelman Irina (FRC KSC RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Ivantsov Ruslan (FRC KSC RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Petrakovskaja Eleonora (FRC KSC RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)

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