2019
DOI: 10.1063/1.5108640
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Ferroelectricity in the 1 μ C cm−2 range induced by canted antiferromagnetism in (LaMn3)Mn4O12

Abstract: Pyroelectric current and field-dependent specific heat measurements on polycrystalline samples of the quadruple perovskite (LaMn3)Mn4O12 give evidence of ferroelectricity driven by the canted antiferromagnetic ordering of the B-site Mn3+ ions at TN,B=78 K with record large remnant electric polarization up to 0.56 μC cm−2. X-ray diffraction measurements indicate an anomalous behavior of the monoclinic β angle at TN,B, which suggests that the polarization lies in the ac-plane, where the moments are collinear, an… Show more

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Cited by 13 publications
(12 citation statements)
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“…3. According to the first scenario that invokes an enhancement of the canted component of the AFM structure at T * , the symmetric exchange interaction associated with this component would be the driving mechanism of ferroelectricity, as already proposed for both CaMn 7 O 12 [13] and LaMn 7 O 12 [4]. The second scenario of net magnetization at the domain boundary is consistent with a theoretical model of AFM magnetoelectrics predicting the formation of a net magnetization at the AFM domain boundary [38].…”
supporting
confidence: 84%
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“…3. According to the first scenario that invokes an enhancement of the canted component of the AFM structure at T * , the symmetric exchange interaction associated with this component would be the driving mechanism of ferroelectricity, as already proposed for both CaMn 7 O 12 [13] and LaMn 7 O 12 [4]. The second scenario of net magnetization at the domain boundary is consistent with a theoretical model of AFM magnetoelectrics predicting the formation of a net magnetization at the AFM domain boundary [38].…”
supporting
confidence: 84%
“…Manganese oxides, such as simple perovskites REMnO 3 (RE = rare earth) with non-collinear E-type antiferromagnetic (AFM) structure [1] and quadruple perovskites AMn 7 O 12 (A=Ca, La) with canted AFM structure [2][3][4][5], have attracted a great deal of interest for they display enhanced magnetic ferroelectricity (MF). Among these compounds, LaMn 7 O 12 , first reported by Bochu et al [6], exhibits record values of remanent polarization at saturation as high as 0.56 µC cm −2 in polycrystalline samples [4]. Even higher values 1-10 µC cm −2 are expected in single crystals or epitaxial films, which may enable the realization of novel applications like fast, nonvolatile and low-energy-consumption memories [7][8][9].…”
mentioning
confidence: 99%
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“…The above unique features may explain the fact that the QP manganites (AMn 3 )Mn 4 O 12 exhibit almost full charge, spin and orbital orderings with sharp phase transitions and no coexistence of the disordered phase. [7] Recently, these manganites have attracted further interest for the record value of electric polarizations induced by magnetic order reported for A=Ca [9] and A=La [10].…”
mentioning
confidence: 99%