Magnetic properties of rare earth orthoferrites grown by a floating zone technique

Dielectric relaxation in the DyMn1−xFexO3 system

“…18 The relaxation process becomes easier because the canted AFM states allow a higher chance for electron transfer, compared with the collinear AFM state, and this effect introduces a smaller E a . The small amounts of Mn 4 þ /Mn 2þ and Fe 2þ , due to the inevitable presence of oxygen defects, which occur often in manganites 22 and ferrites, 23 are likely to be responsible for the relaxation process. The electron can hop in an external ac electric field between mixed-valence ions.…”

Crystal growth and magnetic property of YFeO 3 crystal

“…The floating zone crystal growth method with an infrared convergence type heater can easily reach a high temperature exceeding the melting point of YFeO 3 crystal and can avoid the contamination because no crucible is needed and a moderate temperature gradient is realized (Fairholme et al 1971;Balbashov and Egorov 1981;Koohpayeh et al 2007). In the present work, the floating zone growth of YFeO 3 crystals has been systematically investigated and high quality YFeO 3 crystal was obtained by seeded growth through optimized process.…”

The influence of growth rate on the microstructural and magnetic properties of float-zone grown crystals

“…The Bridgman method performed under an oxygen atmosphere, was found to yield the best results, although some defects such as small inclusions, bubbles, twinning and striations were still reported. In the early 1970s, Okada et al [29] and Fairholme et al [30] were the first to report encouraging results on the growth of orthoferrite crystals (up to 6 cm long and 1 cm diameter) by a floating zone method. They reported the advantages of this technique to be a shorter growth time and less contamination since no crucible or flux was required.…”