Impact of the surface phase transition on magnon and phonon excitations in BiFeO3nanoparticles

Ian Aupiais; Pierre Hemme; Marc Allen; Alexis M. Scida; Xiao Lu; Christian Ricolleau; Yann Gallais; Alain Sacuto; Stanislaus S. Wong; Rogério De Sousa; Maximilien Cazayous

doi:10.1063/5.0003853

Impact of the surface phase transition on magnon and phonon excitations in BiFeO₃nanoparticles

Ian Aupiais
, Pierre Hemme
, Marc Allen
, Alexis M. Scida
, Xiao Lu
, Christian Ricolleau
, Yann Gallais
, Alain Sacuto
, Stanislaus S. Wong
, Rogério De Sousa
, Maximilien Cazayous

Chemistry

Université Paris Cité
University of Victoria BC
Oregon State University
Stony Brook University

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

5 Scopus citations

Abstract

We have performed Raman scattering measurements on bismuth ferrite (BiFeO3) nanoparticles and studied both magnetic and lattice modes. We reveal strong anomalies between 140 K and 200 K at the frequency of magnon and E(LO1), E(TO1), and A1(LO1) phonon modes. These anomalies are related to a surface expansion and are enhanced for nanoparticle sizes approaching the spin cycloidal length. These observations point out the strong interplay between the surface, the lattice, and the magnetism for sizes of BiFeO3 nanoparticles close to cycloid periodicity.

Original language	English
Article number	172903
Journal	Applied Physics Letters
Volume	116
Issue number	17
DOIs	https://doi.org/10.1063/5.0003853
State	Published - Apr 27 2020

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title = "Impact of the surface phase transition on magnon and phonon excitations in BiFeO3nanoparticles",

abstract = "We have performed Raman scattering measurements on bismuth ferrite (BiFeO3) nanoparticles and studied both magnetic and lattice modes. We reveal strong anomalies between 140 K and 200 K at the frequency of magnon and E(LO1), E(TO1), and A1(LO1) phonon modes. These anomalies are related to a surface expansion and are enhanced for nanoparticle sizes approaching the spin cycloidal length. These observations point out the strong interplay between the surface, the lattice, and the magnetism for sizes of BiFeO3 nanoparticles close to cycloid periodicity.",

author = "Ian Aupiais and Pierre Hemme and Marc Allen and Scida, \{Alexis M.\} and Xiao Lu and Christian Ricolleau and Yann Gallais and Alain Sacuto and Wong, \{Stanislaus S.\} and \{De Sousa\}, Rog{\'e}rio and Maximilien Cazayous",

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doi = "10.1063/5.0003853",

language = "English",

volume = "116",

journal = "Applied Physics Letters",

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TY - JOUR

T1 - Impact of the surface phase transition on magnon and phonon excitations in BiFeO3nanoparticles

AU - Aupiais, Ian

AU - Hemme, Pierre

AU - Allen, Marc

AU - Scida, Alexis M.

AU - Lu, Xiao

AU - Ricolleau, Christian

AU - Gallais, Yann

AU - Sacuto, Alain

AU - Wong, Stanislaus S.

AU - De Sousa, Rogério

AU - Cazayous, Maximilien

PY - 2020/4/27

Y1 - 2020/4/27

N2 - We have performed Raman scattering measurements on bismuth ferrite (BiFeO3) nanoparticles and studied both magnetic and lattice modes. We reveal strong anomalies between 140 K and 200 K at the frequency of magnon and E(LO1), E(TO1), and A1(LO1) phonon modes. These anomalies are related to a surface expansion and are enhanced for nanoparticle sizes approaching the spin cycloidal length. These observations point out the strong interplay between the surface, the lattice, and the magnetism for sizes of BiFeO3 nanoparticles close to cycloid periodicity.

AB - We have performed Raman scattering measurements on bismuth ferrite (BiFeO3) nanoparticles and studied both magnetic and lattice modes. We reveal strong anomalies between 140 K and 200 K at the frequency of magnon and E(LO1), E(TO1), and A1(LO1) phonon modes. These anomalies are related to a surface expansion and are enhanced for nanoparticle sizes approaching the spin cycloidal length. These observations point out the strong interplay between the surface, the lattice, and the magnetism for sizes of BiFeO3 nanoparticles close to cycloid periodicity.

UR - https://www.scopus.com/pages/publications/85111210021

U2 - 10.1063/5.0003853

DO - 10.1063/5.0003853

M3 - Article

AN - SCOPUS:85111210021

SN - 0003-6951

VL - 116

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 172903

ER -

Impact of the surface phase transition on magnon and phonon excitations in BiFeO₃nanoparticles

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