B-cation arrangements in double perovskites

Anderson, Mark T.; Greenwood, K. B.; Taylor, Gregg A.; Poeppelmeier, Kenneth R.

doi:10.1016/0079-6786(93)90004-b

Cited by 1,039 publications

(705 citation statements)

References 35 publications

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“…1 for substrate and film peak is due to the Cu K α doublet only. For the double-perovskites random, rock salt and layered B',B" sublattice types are known 10 . In neutron powder diffraction of SFMO Rietveld refinement showed perfect B',B"-rock salt structure 2 .…”

Section: Resultsmentioning

confidence: 99%

Hall effect of epitaxial double-perovskite Sr2FeMoO6 thin films

Westerburg

Martin

Jakob

2000

Journal of Applied Physics

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We prepared high epitaxial thin films of the compound Sr2FeMoO6 with narrow rocking curves by pulsed laser deposition. The diagonal and nondiagonal elements of the resistivity tensor were investigated at temperatures from 4 K up to room temperature in magnetic fields up to 8 T. An electronlike ordinary Hall effect and a holelike anomalous Hall contribution are observed. Both coefficients have reversed sign compared to the colossal magnetoresistive manganites. We found at 300 K an ordinary Hall coefficent of −1.87 × 10 −10 m 3 /As, corresponding to a nominal charge carrier density of four electrons per formula unit. At low temperature only a small negative magnetoresistance is observed which vanishes at higher temperatures. The temperature coefficient of the resistivity is negative over the whole temperature range. A Kondo like behavior is observed below 30 K while above 100 K variable range hopping like transport occurs.

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Section: Resultsmentioning

confidence: 99%

Hall effect of epitaxial double-perovskite Sr2FeMoO6 thin films

Westerburg

Martin

Jakob

2000

Journal of Applied Physics

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“…Moreover, the ionic radii difference between those ions must be within a limited range often preventing synthesis of a variety interesting structures. [72] Consequently, there are formidable challenges for the bulk synthesis of many theoretically proposed ordered double-perovskite materials, which are expected to host many interesting phenomena [20,[77][78][79] With the recent advances in thin-film growth techniques, it was noticed that there is another way to overcome those limitations. [66,[80][81][82][83] As illustrated in Fig.…”

Section: Artificial Double-perovskite Latticementioning

confidence: 99%

“…[72] In this family, the B and B ′ ions are naturally ordered by forming a rock salt sublattice with B-O-B ′ super-exchange that can generate rich magnetic and topological behaviors depending on the choice of the transition metal elements. Thus, the ordered double perovskites offer an excellent engineering playground for which potential functionalities can be predicted and explored [72][73][74][75][76] . From the synthesis perspective, in the bulk the formation of an ordered double perovskite requires a relatively large difference between the chemical valences of B and B ′ ions.…”

Section: Artificial Double-perovskite Latticementioning

confidence: 99%

Geometrical lattice engineering of complex oxide heterostructures: a designer approach to emergent quantum states

et al. 2016

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Epitaxial heterostructures composed of complex oxides have fascinated researchers for over a decade as they offer multiple degrees of freedom to unveil emergent many-body phenomena often unattainable in bulk. Recently, apart from stabilizing such artificial structures along the conventional [001]-direction, tuning the growth direction along unconventional crystallographic axes has been highlighted as a promising route to realize novel quantum many-body phases. Here we illustrate this rapidly developing field of geometrical lattice engineering with the emphasis on a few prototypical examples of the recent experimental efforts to design complex oxide heterostructures along the (111) orientation for quantum phase discovery and potential applications.

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“…[3][4][5][6][7][8] These compounds of chemical formula A 2 BB ′ O 6 feature ordered, interpenetrating facecentered cubic (FCC) lattices of the B and B ′ ions when the charge difference between these ions is large. 9 Both B and B ′ transition metal ions are octahedrally coordinated by oxygen. A geometrically frustrated FCC lattice is obtained when only the B ′ ions are magnetic.…”

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confidence: 99%

“…34 The second effect is geometrical distortion from the cubic case; monoclinic distortion is commonly seen in double perovskites. 9 Lowered symmetry from the monoclinic distortion will spoil the exchange isotropy directly, and introduce new exchange pathways. One particularly important result is the local z-axis compression or expansion of the B ′ -O octahedra, which we refer to as a tetragonal distortion of these octahedra.…”

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confidence: 99%

Interplay between lattice distortion and spin-orbit coupling in double perovskites

2011

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We develop anisotropic pseudo-spin antiferromagnetic Heisenberg models for monoclinically distorted double perovskites. We focus on these A2BB ′ O6 materials that have magnetic moments on the 4d or 5d transition metal B ′ ions, which form a face-centered cubic lattice. In these models, we consider local z-axis distortion of B ′ -O octahedra, affecting relative occupancy of t2g orbitals, along with geometric effects of the monoclinic distortion and spin-orbit coupling. The resulting pseudo-spin-1/2 models are solved in the saddle-point limit of the Sp(N ) generalization of the Heisenberg model. The spin S in the SU(2) case generalizes as a parameter κ controlling quantum fluctuation in the Sp(N ) case. We consider two different models that may be appropriate for these systems. In particular, using Heisenberg exchange parameters for La2LiMoO6 from a spin-dimer calculation, we conclude that this pseudo-spin-1/2 system may order, but will be very close to a disordered spin liquid state.

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B-cation arrangements in double perovskites

Cited by 1,039 publications

References 35 publications

Hall effect of epitaxial double-perovskite Sr2FeMoO6 thin films

Hall effect of epitaxial double-perovskite Sr2FeMoO6 thin films

Geometrical lattice engineering of complex oxide heterostructures: a designer approach to emergent quantum states

Interplay between lattice distortion and spin-orbit coupling in double perovskites

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