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Condensed Matter > Strongly Correlated Electrons

arXiv:1412.7723 (cond-mat)
[Submitted on 24 Dec 2014]

Title:Direct experimental evidence of multiferroicity in a nanocrystalline Zener polaron ordered manganite

Authors:Vinay Kumar Shukla, Soumik Mukhopadhyay, Kalipada Das, A. Sarma, I. Das
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Abstract:We discuss the particle size driven tunability of the coexistence of ferromagnetism and ferroelectricity in Pr0.67Ca0.33MnO3(PCMO) with the help of x ray diffraction, magnetization, impedance spectroscopy, and remanent polarization measurements. The remanent polarization measurements using the positive up negative down method clearly prove the existence of ferroelectricity in PCMO with phase separation between Zener polaron(ZP) ordered P21nm and disordered Pbnm structures. We also find that the ferroelectric response is enhanced in nanocrystalline samples so long as ZP ordering is not destroyed while the long-range antiferromagnetic ordering at low temperature in bulk system is replaced by ferromagnetic correlations in nanoparticles. The conclusion that by reducing the crystallite size it might be possible to make ferromagnetism and ferroelectricity coexist near room temperature should be generally applicable to all ZP ordered manganites.
Comments: 10 pages, 14 figures
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1412.7723 [cond-mat.str-el]
  (or arXiv:1412.7723v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1412.7723
Journal reference: Phys. Rev. B 90, 245126 (2014)
Related DOI: https://doi.org/10.1103/PhysRevB.90.245126

Submission history

From: Vinay Kumar Shukla [view email]
[v1] Wed, 24 Dec 2014 17:48:02 UTC (823 KB)
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