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Crystal, magnetic structure of multiferroic hexagonal manganite

Date:
February 22, 2016
Source:
International Union of Crystallography
Summary:
Ever since Curie conjectured on 'the symmetry in physical phenomena, symmetry of an electric field and a magnetic field,' it has long been a dream for material scientists to search for this rather unusual class of material. Multiferroic materials are a class of crystalline material which exhibit a number of unique properties, in which at least two order parameters exist simultaneously.
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Crystal structures of paraelectric and ferroelectric phases.
Credit: Sim et al.

Ever since Curie conjectured on "the symmetry in physical phenomena, symmetry of an electric field and a magnetic field," it has long been a dream for material scientists to search for this rather unusual class of material exhibiting the coexistence of magnetism and ferroelectricity in a single compound known as a multiferroic compound.

Multiferroic materials are a class of crystalline material which exhibit a number of unique properties, in which at least two order parameters exist simultaneously; ferro- (or antiferro-) magnetic, ferroelectric and ferroelastic degrees of freedom. These properties give rise to a number of useful and practical applications such as memory devices and sensors. Even though multiferroic materials are relatively commonplace much is still not known about their molecular make-up and properties. This article presents an extended and comprehensive review of the structure and multiferroic properties of the hexagonal rare-earth manganite RMnO3, in which there are ferroelectric and magnetic orders. Strong interaction between these orders causes a series of interesting properties of multiferroics. The review describes multiferroics with antiferromagnetic and ferroelectric orders. A commentary about this paper has also been commissioned.

Thanks to the extensive volume of works carried out in this field worldwide over the past decade or so, the list of materials exhibiting multiferroic behaviour has expanded far beyond the few that were studied in Russia at the time of Curie's conjecture in the 1960s. This experimental renaissance of multiferroic physics gives a long overdue justification to the earlier pioneering theoretical works and judging by the pace of current research is set to continue well into the 21st Century.


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The above post is reprinted from materials provided by International Union of Crystallography. Note: Content may be edited for style and length.


Journal References:

  1. Hasung Sim, Joosung Oh, Jaehong Jeong, Manh Duc Le, Je-Geun Park. HexagonalRMnO3: a model system for two-dimensional triangular lattice antiferromagnets. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2016; 72 (1): 3 DOI: 10.1107/S2052520615022106
  2. A. N. Pirogov. Polarization inRMnO3multiferroics. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2016; 72 (1): 1 DOI: 10.1107/S2052520616001062

Cite This Page:

International Union of Crystallography. "Crystal, magnetic structure of multiferroic hexagonal manganite." ScienceDaily. ScienceDaily, 22 February 2016. <www.sciencedaily.com/releases/2016/02/160222142821.htm>.
International Union of Crystallography. (2016, February 22). Crystal, magnetic structure of multiferroic hexagonal manganite. ScienceDaily. Retrieved August 24, 2016 from www.sciencedaily.com/releases/2016/02/160222142821.htm
International Union of Crystallography. "Crystal, magnetic structure of multiferroic hexagonal manganite." ScienceDaily. www.sciencedaily.com/releases/2016/02/160222142821.htm (accessed August 24, 2016).

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