Oxygen displacements and magnetoelectric coupling in LuMnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>

Tong, P.; Louca, Despina; Lee, Nara; Cheong, Sang‐Wook

doi:10.1103/physrevb.86.094419

Cited by 15 publications

(19 citation statements)

References 20 publications

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“…Both a and c lattice parameters are found to vary linearly as a function of x Mn as shown in Fig. 1(b), smoothly interpolating between those of pure LuMnO 3 [8,[21][22][23] and epitaxially grown h-LuFeO 3 thin films [15,16] Fig. 2(b)], where a similar bifurcation is observed, indicating weak or canted ferromagnetism along the c axis as is found in pure h-LuFeO 3 films.…”

Section: A Lufe 1−x Mn X Omentioning

confidence: 60%

“…Interestingly, these are substantially reduced from the values determined through our Curie-Weiss analysis by over 1μ B /ion. This phenomenon has been observed in many isostructural RMnO 3 compounds [11,[21][22][23][24][25][26][27] 12-g polycrystalline sample was fabricated with y = 0.5 and investigated using similar magnetometry, neutron diffraction, and neutron spectroscopy techniques in order to compare with the mixed transitionmetal ion Fe-Mn series. Shown in Fig.…”

Section: A Lufe 1−x Mn X Omentioning

confidence: 99%

“…This includes the highest T N observed to date for this class of materials (172 K), and the appearance of weak ferromagnetism consistent with thin-film studies. Furthermore, we are able to construct a phase diagram [8,[19][20][21][22][23] and epitaxially grown h-LuFeO 3 thin films [15,16] following Vergard's law. (c)-(e) Potential magnetic structures of h-LFO.…”

Section: Introductionmentioning

confidence: 99%

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Multiferroicity in doped hexagonalLuFeO3

et al. 2015

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The hexagonal phase of LuFeO 3 is a rare example of a multiferroic material possessing a weak ferromagnetic moment, which is predicted to be switchable by an electric field. We stabilize this structure in bulk form though Mn and Sc doping, and determine the complete magnetic and crystallographic structures using neutron-scattering and magnetometry techniques. The ferroelectric P 6 3 cm space group is found to be stable over a wide concentration range, ordering antiferromagnetically with Néel temperatures that smoothly increase following the ratio of c to a (c/a) lattice parameters up to 172 K, the highest found in this class of materials to date. The magnetic structure for a range of temperatures and dopings is consistent with recent studies of high quality epitaxial films of pure hexagonal LuFeO 3 including a ferromagnetic moment parallel to the ferroelectric axis. We propose a mechanism by which room-temperature multiferroicity could be achieved in this class of materials.

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Section: A Lufe 1−x Mn X Omentioning

confidence: 60%

Section: A Lufe 1−x Mn X Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multiferroicity in doped hexagonalLuFeO3

et al. 2015

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“…LuMnO 3 is another case where the SHG and neutron diffraction disagree, in that SHG found domains with a À 4 structure at high temperatures, but À 3 at low temperatures with an intermediate À 6 phase coexisting with either of the others (Fiebig et al, 2000). However, neutron diffraction measurements saw no evidence of the À 3 structure at any temperature (Park et al, 2010;Tong et al, 2012): some Bragg peaks such as 100 expected for the À 3 structure are absent in the experimental data. Furthermore, no evidence of the second phase transition was found in the measurements of physical properties such as dielectric constants (Katsufuji et al, 2001).…”

Section: Magnetic Transitionmentioning

confidence: 95%

HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets

Sim

Jeong

et al. 2016

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The hexagonal RMnO 3 (h-RMnO 3 ) are multiferroic materials, which exhibit the coexistence of a magnetic order and ferroelectricity. Their distinction is in their geometry that both results in an unusual mechanism to break inversion symmetry and also produces a two-dimensional triangular lattice of Mn spins, which is subject to geometrical magnetic frustration due to the antiferromagnetic interactions between nearest-neighbor Mn ions. This unique combination makes the h-RMnO 3 a model system to test ideas of spin-lattice coupling, particularly when both the improper ferroelectricity and the Mn trimerization that appears to determine the symmetry of the magnetic structure arise from the same structure distortion. In this review we demonstrate how the use of both neutron and X-ray diffraction and inelastic neutron scattering techniques have been essential to paint this comprehensive and coherent picture of h-RMnO 3 .

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“…It has been previously suggested that the local symmetry in LuMnO 3 is lower than the reported P6 3 cm due to the enhanced tilting of the MnO 5 bipyramids, creating three unique Mn-O bonds in the plane. The P6 3 symmetry can better describe the local structure 15) and this may be significant in the magnetic interactions. Unlike in YMnO 3 , no single-ion anisotropy is present in LuMnO 3 16) and the interlayer superexchange is weaker, 14) but in this paper we show that nearest-and next-nearest-neighbor Mn interactions rise above the frustration to establish interplane coupling well above T N .…”

Section: Introductionmentioning

confidence: 99%

Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO₃

et al. 2014

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Residual magnetic frustration in the multiferroic LuMnO 3 may be key towards understanding magneto-elastic coupling in hexagonal manganites. Critical magnetic scattering present well above the magnetic ordering temperature T N persists below, as observed by inelastic neutron scattering. The magnetic fluctuations are confined in two dimensions implied by the characteristic wavevector dependence of the magnetic structure factor that changes from symmetric to asymmetric across T N. The low dimensionality of the magnetic structure is also evident in the temperature dependence of the commensurate antiferromagnetic intensity which follows a mean field exponent of ¢ ³ 0.2. 100 K, and (e) at 180 K.

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Oxygen displacements and magnetoelectric coupling in LuMnO3

Cited by 15 publications

References 20 publications

Multiferroicity in doped hexagonalLuFeO3

Multiferroicity in doped hexagonalLuFeO3

HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets

Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO₃

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Oxygen displacements and magnetoelectric coupling in LuMnO3

Cited by 15 publications

References 20 publications

Multiferroicity in doped hexagonalLuFeO3

Multiferroicity in doped hexagonalLuFeO3

HexagonalRMnO3: a model system for two-dimensional triangular lattice antiferromagnets

Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO3

Contact Info

Product

Resources

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HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets

Intertwining of Frustration with Magneto-Elastic Coupling in the Multiferroic LuMnO₃