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Ferroelectrics Volume 534, 2018 - Issue 1: Proceedings of the 14th International Meeting on Ferroelectricity, Part II
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Section D: Ferroics and Multiferroics

On the unusual magnetic response of cryomilled BiFeO3 polycrystals

G. S. DiasDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil; Correspondence[email protected]
,
E. A. VolnistemDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil;
,
J. M. P. LeonardoDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil;
,
D. M. SilvaDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil;
,
L. F. CóticaDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil;
,
I. A. SantosDepartment of Physics, State University of Maringá, Maringá, Paraná, Brazil;
&
D. GarciaDepartment of Physics, Federal University of São Carlos, São Carlos, São Paulo, Brazil
 show all
Pages 146-151 | Received 05 Sep 2017, Accepted 20 Feb 2018, Published online: 27 Feb 2019
 
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Abstract

In the present work the influence of milling process below 173 K (cryomilling) on the nanostructuration of BiFeO3 powders, synthesized by fast-firing thermal treatment allied to high-energy ball milling, is evaluated as function of milling time as well as balls size/mass ratio. The influence of the cryomilling process on the structural and magnetic properties of BiFeO3 powders is investigated and the key role of the crystallite size on the magnetic response is evidenced. The results show a strong nonlinear magnetic response, which is governed by the crystallite size while induced strain does not play an important role.

Funding

This research was supported by the Brazilian funding agencies CAPES (Procad 88881.068509/2014-01) and CNPq (procs. 308622/2013-8, 446565/2014-8, and 429687/2016-8). E.A.V. and J.M.P.L. also thanks CAPES and CNPq, respectively, for the fellowship.

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