NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2014, 5 (5), P. 692-702
SYNTHESIS AND THE STUDY OF MAGNETIC CHARACTERISTICS OF NANO La1-xSrxFeO3 BY CO-PRECIPITATION METHOD
A. T. Nguyen – Ho Chi Minh City Pedagogical University, Ho Chi Minh City, Viet Nam; anhtien0601@rambler.ru
M. V. Knurova – Voronezh State University, Voronezh, Russia; cnurova2010@yandex.ru
T. M. Nguyen – Ha Noi National University of Education, Ha Noi, Viet Nam; montvn@gmail.com
V. O. Mittova – Voronezh State Medical Academy, Voronezh, Russia; vmittova@mail.ru
I.Ya. Mittova – Voronezh State University, Voronezh, Russia; imittova@mail.ru
The goal of this study was the sol-gel synthesis of nanocrystals La1-xSrxFeO3 (x=0.0, 0.1, 0.2, 0.3) and an examination of their magnetic properties. An aqueous solution of ammonia and 5% ammonium carbonate solution were used as precipitating agents. It was established that the crystallization of LaFeO3 is completed at 750 °C (annealing for 1 h). The average diameter of the synthesized particles was 80{100 nm. Investigation of the magnetic properties showed non-monotonic changes of saturation magnetic moment and increase of coercive force with increased Sr content in the sample.
Keywords: sol-gel synthesis; nanopowders; lanthanum ferrite; magnetic properties; high-coercivity materials.
PACS 75.50.Cc, 81.07.Wx
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