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Title: Mossbauer spectroscopic study of spin reorientation in Mn-substituted yttrium orthoferrite
Authors: Sundarayya, Y
Mandal, P
Sundaresan, A
Rao, C N R
Keywords: Magnetic-Properties
Phase Coexistence
Issue Date: 2-Nov-2011
Publisher: IOP Publishing Ltd
Citation: Journal of Physics: Condensed Matter 23(43), 436001-(1-7) (2011)
Abstract: The first-order spin-reorientation transition in the Mn-substituted yttrium orthoferrites, YFe(1-x)Mn(x)O(3) (x = 0.1, 0.15 and 0.2), has been investigated using (57)Fe Mossbauer spectroscopy. Owing to its large anisotropy, substitution of Mn(3+) ions in YFeO(3) induces a spin-reorientation transition from the low-temperature antiferromagnetic state to a high-temperature weak ferromagnetic state. With increasing x, the spin-reorientation transition temperature (T(SR)) increases whereas the Neel temperature (T(N)) decreases. Analysis of the Mossbauer spectra unambiguously confirms the occurrence of spin reorientation relative to crystal axes. At a given temperature, the mean hyperfine field decreases with the increasing Mn concentration. The variation of canting angle with temperature for YFe(0.85)Mn(0.15)O(3) has been estimated.
Description: Restricted Access
Other Identifiers: 0953-8984
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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