Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 690, Issue -, Pages 909-915Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.07.010
Keywords
Ceramics; Double perovskite; Magnetostriction; Order-disorder effects; Spin phonon coupling; Raman spectroscopy
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Funding
- CNPq [461621/2014-2]
- FAPEMA [02121/12-PRONEM]
- CAPES [552512/2011-7]
- Ministerio de Economia y Competitividad (Spain) [ENE2014-56237-C4-4-R]
- Xunta de Galicia [GRC2014/042]
- Xunta de Galicia
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Spin-phonon coupling in rare-earth based, manganites with double perovskite structure plays a crucial role in the magnetoelectric properties of these ferromagnetic materials. Particularly, on Y2CoMnO6 (YCMO), it is assumed that spin-phonon coupling is related to the induced ferroelectric polarization. This confers to YCMO a multiferroic characteristic. In this work, we probed the spin-phonon coupling in YCMO by temperature-dependent Raman spectroscopy measurements in ceramic samples obtained by the nitrate decomposition method. Raman scattering revealed some anomalies that could be attributed to a weak spin-phonon coupling, an unconventional behavior for rare-earth based manganites with double perovskite structure, in which the coupling does not fit with the quadratic magnetization. (C) 2016 Elsevier B.V. All rights reserved.
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