Lattice Effects on the Magnetoresistance in Doped LaMn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Hwang, H. Y.; Cheong, S. W.; Radaelli, P. G.; Marezio, M.; Batlogg, B.

doi:10.1103/physrevlett.75.914

Cited by 1,926 publications

(1,111 citation statements)

References 15 publications

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“…We have been discussing magnetic properties and multiferroics but one could pursue many other directions. It is understood [68] that the electronic properties of transition metal perovskites can be significantly altered by changing the octahedral rotation angle, a key ingredient to realize such exotic electronic properties as colossal magnetoresistance. The hybrid improper mechanism opens the door to electric-field control of octahedral rotations and electronic properties.…”

Section: Functional Octahedral Rotationsmentioning

confidence: 99%

Polar octahedral rotations: A path to new multifunctional materials

Benedek

Mulder

Fennie

2012

Journal of Solid State Chemistry

223

241

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Perovskite ABO 3 oxides display an amazing variety of phenomena that can be altered by subtle changes in the chemistry and internal structure, making them a favorite class of materials to explore the rational design of novel properties. Here we highlight a recent advance in which rotations of the BO 6 octahedra give rise to a novel form of ferroelectricity -hybrid improper ferroelectricity. Octahedral rotations also strongly influence other structural, magnetic, orbital, and electronic degrees of freedom in perovskites and related materials. Octahedral rotation-driven ferroelectricity consequently has the potential to robustly control emergent phenomena with an applied electric field. The concept of 'functional' octahedral rotations is introduced and the challenges for materials chemistry and the possibilities for new rotationdriven phenomena in multifunctional materials are explored.

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Section: Functional Octahedral Rotationsmentioning

confidence: 99%

Polar octahedral rotations: A path to new multifunctional materials

Benedek

Mulder

Fennie

2012

Journal of Solid State Chemistry

223

241

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“…The resulting internal pressure is expressed by a tolerance factor 1 t < and can be varied by replacing La by other rare-earth ions [42,47,48]. Both the Jahn-Teller distortion and the internal pressure effect results in changes of the Mn -O-Mn bond length and angle thereby influencing the hopping strength t of the g e electrons and, hence, the electrical conductivity and c T [47].…”

Section: Transport Propertiesmentioning

confidence: 99%

Structure and transport properties of coherently strained La_2/3Ca_1/3MnO₃/SrTiO₃ superlattices

Klein

Herbstritt

et al. 2005

Physica Status Solidi (b)

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We have prepared high quality, coherently strained La 2/3 Ca 1/3 MnO 3 /SrTiO 3 superlattices with different modulation periods by laser molecular beam epitaxy on (001) SrTiO 3 and NdGaO 3 substrates. A detailed structural characterization was performed by high-angle X-ray diffraction (HAXRD) and low-angle X-ray reflectivity (LAXRR). All superlattices are very flat, show excellent structural coherence and very small mosaic spread (0.02°). The in-plane coherency strain was varied by changing the thickness ratio of the constituent layers allowing for a systematic variation of the resulting tetragonal distortion of LCMO. The c-axis lattice parameter of LCMO could be continuously changed from 3.87 Å to 3.79 Å. The interface roughness was analyzed by offset low-angle X-ray reflectivity and low-angle rocking curve measurements. It was found to be of the order of one unit cell with a significant part of the roughness being vertically correlated. The strain induced tetragonal distortion of LCMO was found to cause strong reduction of the paramagnetic to ferromagnetic transition temperature from about 260 to 120 K and an increase of resistivity. The transport properties in the paramagnetic regime could be well described by a small polaron hopping model. The lattice distortions were found to result in a significant increase of the polaron trapping energy. Our results show that coherently strain superlattices are an interesting model system for the systematic study of the effect of lattice distortions on the magnetic and electronic properties of the doped manganites.

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“…Since the ferromagnetic Curie temperature (T C ) and the metal insulator transition temperature (T MI ) in such compounds are related to the strength of the transfer integral between Mn +3/+4 through the Mn +3 -O -Mn +4 path, there is a strong interplay between the structural, magnetic and transport properties. The study of Hwang et al 4 on (La 1-x R x ) 0.7 Ca 0.3 MnO 3 in which some La +3 is replaced by larger size, Pr +3 and smaller size Y +3 , reveals that the best magnetic and transport properties are obtained for a Mn +3 /Mn +4 ratio of 7/3. These authors also found that the T C and the conductivity decrease with increasing Pr +3 /Y +3 content, or in other words, the magnetic and transport properties of the system are a strong function of average A site ionic radius, <r A >.…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis, and magnetic and magnetotransport properties of a (La_1 xLu_x)_0.67Ca_0.33MnO₃(0 x 0.12) system

Das

Raj

Srivastava

et al. 2004

J. Phys.: Condens. Matter

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Lattice Effects on the Magnetoresistance in Doped LaMnO3

Cited by 1,926 publications

References 15 publications

Polar octahedral rotations: A path to new multifunctional materials

Polar octahedral rotations: A path to new multifunctional materials

Structure and transport properties of coherently strained La_2/3Ca_1/3MnO₃/SrTiO₃ superlattices

Low temperature synthesis, and magnetic and magnetotransport properties of a (La_1 xLu_x)_0.67Ca_0.33MnO₃(0 x 0.12) system

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Lattice Effects on the Magnetoresistance in Doped LaMnO3

Cited by 1,926 publications

References 15 publications

Polar octahedral rotations: A path to new multifunctional materials

Polar octahedral rotations: A path to new multifunctional materials

Structure and transport properties of coherently strained La2/3Ca1/3MnO3/SrTiO3 superlattices

Low temperature synthesis, and magnetic and magnetotransport properties of a (La1 xLux)0.67Ca0.33MnO3(0 x 0.12) system

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Product

Resources

About

Structure and transport properties of coherently strained La_2/3Ca_1/3MnO₃/SrTiO₃ superlattices

Low temperature synthesis, and magnetic and magnetotransport properties of a (La_1 xLu_x)_0.67Ca_0.33MnO₃(0 x 0.12) system