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We report on the synthesis and characterization of BiFe 0.5 Mn 0.5 O 3, a potential type-I multiferroic compound displaying temperature-induced magnetization reversal. Bulk samples were obtained by means of solid-state reaction carried out under the application of hydrostatic pressure of 6 GPa at 1100 C. The crystal structure is a highly distorted perovskite with no cation order on the B site, where, besides a complex scheme of tilt and rotations of the TM-O 6 octahedra, large off-centering of the bismuth ions is detected. Below T 1= 420 K the compound undergoes a first weak ferromagnetic transition related to the ordering of iron-rich clusters. At lower temperatures (just below RT) a complex thermally activated mechanism induces at first an enhancement of the magnetization at T 2= 288 K, then a spontaneous reversal giving rise to a negative response. The complementary use of powder neutron diffraction …
American Physical Society
Publication date: 
30 Jul 2013

Davide Delmonte, Francesco Mezzadri, Chiara Pernechele, Gianluca Calestani, Gabriele Spina, Marco Lantieri, Massimo Solzi, Riccardo Cabassi, Fulvio Bolzoni, Andrea Migliori, Clemens Ritter, Edmondo Gilioli

Biblio References: 
Volume: 88 Issue: 1 Pages: 014431
Physical Review B