Experimental and <i>ab initio</i> investigations of the x-ray absorption near edge structure of orthorhombic LuMnO3

Hu, Yi; Borca, Camelia N.; Kleymenov, Evgeny; Nachtegaal, Maarten; Delley, B.; Janousch, M.; Dönni, A.; Tachibana, Makoto; Kitazawa, Hideaki; Takayama‐Muromachi, E.; Kenzelmann, M.; Niedermayer, Ch.; Lippert, Thomas; Wokaun, Alexander; Schneider, Claudia

doi:10.1063/1.4729002

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…LuMnO 3 crystallizes in the orthorhombic Pbnm space group and has the following lattice parameters: a = 5.2023Å, The refined crystal structure is in good agreement with the earlier studies [17]. Inherent to the RMnO 3 perovskite crystal structure, LuMnO 3 experiences a large GdFeO 3 -type distortion due to the smaller radii of the Lu ion [25,26]. This induces a large deviation of the Mn-O-Mn bond angle away from 180 • as observed in the series of RMnO 3 with small R ion sizes [27].…”

Section: A Structural Propertiessupporting

confidence: 83%

E -type noncollinear magnetic ordering in multiferroic o−LuMnO3

et al. 2017

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Multiferroic orthorhombic o-LuMnO 3 exhibits large ferroelectric polarization induced by an E-type magnetic order. Recently, the E-type magnetic phase in LuMnO 3 was proposed to feature magnetic moments tilted away from the collinear ordering. We employed neutron diffraction to determine the symmetry of the magnetic order in o-LuMnO 3. We observed that below T N = 39 K, the Mn 3+ spins order into an incommensurate amplitudemodulated phase that obeys the Pbnm crystal symmetry and is paraelectric. The incommensurate phase locks into a commensurate phase at T C = 35.5 K described by a fully antiferromagnetic and noncollinear E-type order. This noncollinear E-type ordering breaks the spatial inversion symmetry and induces a spontaneous polarization at T C. At T = 2 K, an appreciably large electric polarization was observed similar to that of other orthorhombic manganites featuring E-type magnetic order. We also present a Pbnm symmetry-allowed Dzyaloshinskii-Moriya interaction that explains the noncollinear E-type order in the commensurate phase. These results are in qualitative agreement with the type of distortions from collinear E-type antiferromagnetic order found using Monte Carlo simulation for rare-earth manganites [M.

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Section: A Structural Propertiessupporting

confidence: 83%

E -type noncollinear magnetic ordering in multiferroic o−LuMnO3

et al. 2017

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“…To provide more atomic oxygen for the film growth, N 2 O was used as the background gas (pN 2 O ¼ 0.3 mbar). By using Cu K α x-ray diffraction, the films were shown to be singlephase, untwinned, and of single crystalline quality [21] (see the Supplemental Material [22]). …”

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confidence: 99%

Multiferroic Properties ofo−LuMnO3Controlled byb-Axis Strain

Windsor

Huang

et al. 2014

Phys. Rev. Lett.

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Strain is a leading candidate for controlling magnetoelectric coupling in multiferroics. Here, we use x-ray diffraction to study the coupling between magnetic order and structural distortion in epitaxial films of the orthorhombic (o-) perovskite LuMnO(3). An antiferromagnetic spin canting in the E-type magnetic structure is shown to be related to the ferroelectrically induced structural distortion and to a change in the magnetic propagation vector. By comparing films of different orientations and thicknesses, these quantities are found to be controlled by b-axis strain. It is shown that compressive strain destabilizes the commensurate E-type structure and reduces its accompanying ferroelectric distortion.

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“…Figure 1(a) illustrates how strain leads to the monoclinic distortion that lowers the crystal symmetry at the interface [24]. Furthermore, the strain along the [001] and [1 À10] directions modifies the anisotropy of the MnO bonding and Mn orbital ordering, and the severe distortion of the MnO 6 octahedron [25] is expected to influence the magnetic properties of these thin films. The crystallinity of the LMO thin films was studied using both channeling Rutherford backscattering (c-RBS) and high resolution transmission electron microscopy (HRTEM).…”

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confidence: 99%

“…Therefore, our neutron diffraction results evidence a strain-induced change of the AFM structure in the films compared with the bulk. Without large strain-induced changes in the (T-dependent) electronic structure [25], the change in the AFM structure seen in the films likely reflects a strain-induced alteration of the magnetic interactions or the Mn orbital order. According to both calculations [27] and the magnetic phase diagram reported by Goto et al [28], a small increase in the Mn-O-Mn bond angle would shift the magnetism away from the E type and towards a cycloidal spin structure.…”

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confidence: 99%

Strain-Induced Ferromagnetism in AntiferromagneticLuMnO3Thin Films

White

Bator

et al. 2013

Phys. Rev. Lett.

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Single phase and strained LuMnO(3) thin films are discovered to display coexisting ferromagnetic and antiferromagnetic orders. A large moment ferromagnetism (≈1μ(B)), which is absent in bulk samples, is shown to display a magnetic moment distribution that is peaked at the highly strained substrate-film interface. We further show that the strain-induced ferromagnetism and the antiferromagnetic order are coupled via an exchange field, therefore demonstrating strained rare-earth manganite thin films as promising candidate systems for new multifunctional devices.

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Experimental and ab initio investigations of the x-ray absorption near edge structure of orthorhombic LuMnO3

Abstract: Large magneto (thermo) dielectric effect in multiferroic orthorhombic LuMnO3

Cited by 5 publications

References 23 publications

E -type noncollinear magnetic ordering in multiferroic o−LuMnO3

E -type noncollinear magnetic ordering in multiferroic o−LuMnO3

Multiferroic Properties ofo−LuMnO3Controlled byb-Axis Strain

Strain-Induced Ferromagnetism in AntiferromagneticLuMnO3Thin Films

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