Multiferroic Properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>o</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mi>LuMnO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Controlled by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>b</mml:mi></mml:mrow></mml:math>-Axis Strain

Windsor, Yoav William; Huang, S. W.; Hu, Yi; Rettig, Laurenz; Alberca, A.; Shimamoto, Kento; Scagnoli, V.; Lippert, Thomas; Schneider, Claudia; Staub, U.

doi:10.1103/physrevlett.113.167202

Cited by 33 publications

(43 citation statements)

References 29 publications

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“…There is a clear rise of B int between 75 and 50 K reaching a small plateau down to 40 K before rising a second time with a saturation of B int starting at 30 K. The transition starting between 75 and 100 K is associated with the appearance of FM order [22], and the plateau starting at ≈50 K would correspond to a saturation of the magnetic moment. The second transition observed ≈40 K agrees well with the onset of antiferromagnetism in LMO films and bulk [22][23][24]34]. It is important to note that a zero magnetic field μSR measurement provides a true microscopic confirmation of a magnetic ground state, i.e., the magnetic component is not induced by the application of an external magnetic field.…”

Section: A Magnetic Characterizationsupporting

confidence: 75%

“…1. These magnetization measurements therefore establish an onset of the FM order at relatively high temperatures independent of the AFM order observed below T ≈ 40 K [22,24]. In addition, the magnetization measurements show that the ferromagnetism in our films is relatively soft above T ≈ 40 K but becomes harder with decreasing temperatures.…”

Section: A Magnetic Characterizationsupporting

confidence: 65%

“…In our o-LMO films, a FM interface layer ≈10 nm thick has been measured with a magnetic moment of ≈1μ B /Mn, decaying toward the film surface with a total moment of ≈ 0.5 μ B /Mn in addition to incommensurate (IC) antiferromagnetic (AFM) ordering [22,24]. Due to reported values of q k close to 0.5 for LuMnO 3 films, it is speculated that there is a coexistence of a cycloidal and an E-type state [24], as is suspected for (010) YMnO 3 films [17].…”

Section: Introductionmentioning

confidence: 99%

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Coexisting multiple order parameters in single-layerLuMnO3films

et al. 2016

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Magnetoelectric multiferroics hold great promise for electrical control of magnetism or magnetic control of ferroelectricity. However, single phase ferroelectric materials with a sizeable ferromagnetic magnetization are rare. Here, we demonstrate that a single-phase orthorhombic LuMnO 3 thin film features coexisting magnetic and ferroelectric orders. The temperature dependence of the different order parameters are presented with ferromagnetic order appearing below 100 K and thus at much higher temperatures than ferroelectricity or antiferromagnetism (T N ,T FE 40 K).

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Section: A Magnetic Characterizationsupporting

confidence: 75%

Section: A Magnetic Characterizationsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

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Coexisting multiple order parameters in single-layerLuMnO3films

et al. 2016

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“…From the magnetic resonant diffraction we figured out that the ordering of Mn spins also differs significantly between the strained and the relaxed o-HMO films. 35,43,44 It is thus demonstrated that the compressively strained o-HMO films acquire two key differences in their multiferroic properties with respect to relaxed films and to bulk: an increased value of the T FE , and an enlarged magnetic modulation q b , which is pushed close to the commensurate E-type value of 0.5. It is reasonable to argue that these significant differences are a consequence of the modification of interatomic distances by epitaxial strain.…”

mentioning

confidence: 98%

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Shimamoto

Windsor

et al. 2016

Applied Physics Letters

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Multiferroic properties of orthorhombic HoMnO 3 (Pbnm space group) are significantly modified by epitaxial compressive strain along the a-axis. We are able to focus on the effect of strain solely along the a-axis by using an YAlO 3 (010) substrate, which has only a small lattice mismatch with HoMnO 3 along the other in-plane direction (the c-axis). Multiferroic properties of strained and relaxed HoMnO 3 thin films are compared with those reported for bulk, and are found to differ widely. A relaxed film exhibits bulk-like properties such as a ferroelectric transition temperature of 25 K and an incommensurate antiferromagnetic order below 39 K, with an ordering wave vector of (0 q b 0) with q b ≈ 0.41 at 10 K. A strained film becomes ferroelectric already at 37.5 K and has an incommensurate magnetic order with q b ≈ 0.49 at 10 K.

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“…For example, in multiferroic materials, the ferroelectric polarization is strongly coupled to the underlying crystal structure, which can be tuned by strain, and will affect the magnetization via magnetostriction. 8 Likewise, uniaxial strain can be utilized to alter magnetic exchange integral overlap along a specific direction, and thus introduce or enhance magnetic anisotropy. It has also been demonstrated that magnetic anisotropy in magnetocaloric materials results in the rotating magnetocaloric effect, which is believed to facilitate the implementation of magnetic cooling.…”

mentioning

confidence: 99%

Versatile strain-tuning of modulated long-period magnetic structures

Fobes

Luo

León-Brito

et al. 2017

Applied Physics Letters

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We report a detailed small-angle neutron scattering (SANS) study of the skyrmion lattice phase of MnSi under compressive and tensile strain. In particular, we demonstrate that tensile strain applied in the skyrmion lattice plane, perpendicular to the magnetic field, acts to destabilize the skyrmion lattice phase. This experiment was enabled by our development of a versatile strain cell, unique in its ability to select the application of either tensile or compressive strain in-situ by using two independent helium-actuated copper pressure transducers, whose design has been optimized for magnetic SANS on modulated long-period magnetic structures and vortex lattices, and is compact enough to fit in common sample environments, such as cryostats and superconducting magnets.Modulated long-period magnetic structures incommensurate to the underlying crystal structure have been demonstrated to be at the heart of a wide range of phenomena in solid-state physics such as the magnetoelectric coupling in multiferroic materials, 1 the magnetocaloric effect, 2 , the emergence of topologically-stabilized magnetic defects such as solitons 3 and skyrmions, 4 and unconventional superconductivity. In the latter case, long-period magnetic arrangements arise in two distinct forms, namely the underlying long-range ordered antiferromagnetic state whose critical fluctuations are believed to mediate unconventional superconductivity, 5 and the vortex lattice that forms in type-II superconductors, 6 which in some cases are intimately coupled to one another. 7 This makes long-period magnetic structures relevant for applications ranging from solid-state cooling to energy-applications to data storage and spintronics.Strain frequently represents an important tuning parameter in the optimization of the desired material response related to these phenomena. For example, in multiferroic materials, the ferroelectric polarization is strongly coupled to the underlying crystal structure, which can be tuned by strain, and will affect the magnetization via magnetostriction. 8 Likewise, uniaxial strain can be utilized to alter magnetic exchange integral overlap along a specific direction, and thus introduce or enhance magnetic anisotropy. It has also been demonstrated that magnetic anisotropy in magnetocaloric materials results in the rotating magnetocaloric effect, which is believed to facilitate the implementation of magnetic cooling. 9 Additionally, uniaxial magnetic anisotropy has been shown to increase the stability of skyrmion lattice phases. 10-14 Finally, in the iron pnictide family of materials the antiferromagnetic and unconventional superconducting states show extreme sensitivity to strain. 15 Small-angle neutron scattering (SANS) has proven itself to be one of the most powerful probes to study relevant microscopic parameters of modulated long-period magnetic structures, such as the order parameter and the period, and is a crucial tool for the study of superconducting vortex lattices. 6 However, most available insitu strain application options f...

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Multiferroic Properties ofo−LuMnO3Controlled byb-Axis Strain

Cited by 33 publications

References 29 publications

Coexisting multiple order parameters in single-layerLuMnO3films

Coexisting multiple order parameters in single-layerLuMnO3films

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Versatile strain-tuning of modulated long-period magnetic structures

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