Iso-structural phase transition in YMnO3 nanosized particles

Saurabh Tripathi; Valeri Petkov

doi:10.1063/1.4791596

Iso-structural phase transition in YMnO₃ nanosized particles

Saurabh Tripathi, Valeri Petkov

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Structure studies on multiferroic YMnO₃ particles with size varying between 467 ± 42 nm (bulk) and 28 ± 3 nm was carried out using high-energy synchrotron x-ray diffraction. Analysis of the diffraction data reveals that when the particles size decreases to about 121 nm an iso-structural phase transition takes place. The transition is accompanied by a substantial change in the unit cell volume and the ratio (c/a) of the parameters of the hexagonal lattice of YMnO₃. The phase transition is similar to the one reported in bulk YMnO₃ heated to temperatures of about 920 K. In this letter, we argue that the phase transition in nanosized YMnO ₃ is of an order-disorder type.

Original language	English
Article number	061909
Journal	Applied Physics Letters
Volume	102
Issue number	6
DOIs	https://doi.org/10.1063/1.4791596
State	Published - Feb 11 2013

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abstract = "Structure studies on multiferroic YMnO3 particles with size varying between 467 ± 42 nm (bulk) and 28 ± 3 nm was carried out using high-energy synchrotron x-ray diffraction. Analysis of the diffraction data reveals that when the particles size decreases to about 121 nm an iso-structural phase transition takes place. The transition is accompanied by a substantial change in the unit cell volume and the ratio (c/a) of the parameters of the hexagonal lattice of YMnO3. The phase transition is similar to the one reported in bulk YMnO3 heated to temperatures of about 920 K. In this letter, we argue that the phase transition in nanosized YMnO 3 is of an order-disorder type.",

author = "Saurabh Tripathi and Valeri Petkov",

note = "Funding Information: We thank S. M. Selbach, K. Bergum, M.-A. Einarsrud, and T. Grande for providing us with high quality samples. Use of the Advanced Photon Source is supported by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. W-31-109-Eng-38. ",

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AU - Petkov, Valeri

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N2 - Structure studies on multiferroic YMnO3 particles with size varying between 467 ± 42 nm (bulk) and 28 ± 3 nm was carried out using high-energy synchrotron x-ray diffraction. Analysis of the diffraction data reveals that when the particles size decreases to about 121 nm an iso-structural phase transition takes place. The transition is accompanied by a substantial change in the unit cell volume and the ratio (c/a) of the parameters of the hexagonal lattice of YMnO3. The phase transition is similar to the one reported in bulk YMnO3 heated to temperatures of about 920 K. In this letter, we argue that the phase transition in nanosized YMnO 3 is of an order-disorder type.

AB - Structure studies on multiferroic YMnO3 particles with size varying between 467 ± 42 nm (bulk) and 28 ± 3 nm was carried out using high-energy synchrotron x-ray diffraction. Analysis of the diffraction data reveals that when the particles size decreases to about 121 nm an iso-structural phase transition takes place. The transition is accompanied by a substantial change in the unit cell volume and the ratio (c/a) of the parameters of the hexagonal lattice of YMnO3. The phase transition is similar to the one reported in bulk YMnO3 heated to temperatures of about 920 K. In this letter, we argue that the phase transition in nanosized YMnO 3 is of an order-disorder type.

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Iso-structural phase transition in YMnO₃ nanosized particles

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