Neutron Diffraction Study of La3Ni2O7: Structural Relationships Among n=1, 2, and 3 Phases Lan+1NinO3n+1

Ling, Chris D.; Argyriou, D. N.; Wu, Guoqing; Neumeier, J. J.

doi:10.1006/jssc.2000.8721

Cited by 80 publications

(76 citation statements)

References 14 publications

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“…Therefore, only rhombohedral LaNiO 3 is assumed to exist. Unlike La 2 NiO 4 , the low-temperature measurements revealed no evidence for symmetry lowering or magnetic/charge ordering in La 3 Ni 2 O 7 , La 4 Ni 3 O 10 , and LaNiO 3 [21,[44][45][46]48].…”

Section: Solid Phasesmentioning

confidence: 55%

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Thermodynamic analysis of the ternary La–Ni–O system

Zinkevich

Aldinger

2004

Journal of Alloys and Compounds

117

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Section: Solid Phasesmentioning

confidence: 55%

“…First structure refinements resulted in Fmmm space group [44,45]. Recently, the crystal structure of the lanthanum nickelates La n+1 Ni n O y (n = 1, 2, 3) has been re-investigated by means of neutron and X-ray powder diffraction, synchrotron radiation and EX-AFS spectroscopy [20,46]. The lattice symmetry was found to be orthorhombic.…”

Section: Solid Phasesmentioning

confidence: 97%

Thermodynamic analysis of the ternary La–Ni–O system

Zinkevich

Aldinger

2004

Journal of Alloys and Compounds

117

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“…The heat capacity anomaly in La 4 Ni 3 O 10 around 135 K could be associated with a second-order electronic phase transition [4]. In fact, no structural changes and no long-range magnetic ordering in La 4 Ni 3 O 10 and La 3 Ni 2 O 7 below 300 K were detected [22], whereas the existence of a jump on the electrical resistivity curve at 140-160 K has been confirmed in several works [4,[22][23][24].…”

Section: Thermal Analysis In Controlled Atmospherementioning

confidence: 70%

Stability and thermodynamic functions of lanthanum nickelates

Zinkevich

Solak

Nitsche

et al. 2007

Journal of Alloys and Compounds

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“…The crystals are fragile, likely because of strains and microcracks that develop during the reduction process. Indeed, the structure undergoes a large, highly anisotropic expansion: Δa ∼ Δb ∼ +3.0% and Δc ∼ −6.6% (34,46). Nonetheless, La-438 specimens measured at 15-ID-B of the Advanced Photon Source (APS) definitively showed that they are well-defined single crystals, from which the structure of La-438 was determined (SI Text, SingleCrystal X-Ray Diffraction and Tables S1 and S2).…”

Section: Resultsmentioning

confidence: 99%

Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈

Zhang

Chen

Phelan

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

100

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The quasi-2D nickelate La 4 Ni 3 O 8 (La-438), consisting of trilayer networks of square planar Ni ions, is a member of the so-called T′ family, which is derived from the Ruddlesden-Popper (R-P) parent compound La 4 Ni 3 O 10−x by removing two oxygen atoms and rearranging the rock salt layers to fluorite-type layers. Although previous studies on polycrystalline samples have identified a 105-K phase transition with a pronounced electronic and magnetic response but weak lattice character, no consensus on the origin of this transition has been reached. Here, we show using synchrotron X-ray diffraction on high-pO 2 floating zone-grown single crystals that this transition is associated with a real space ordering of charge into a quasi-2D charge stripe ground state. The charge stripe superlattice propagation vector, q = (2/3, 0, 1), corresponds with that found in the related 1/3-hole doped single-layer R-P nickelate, La 5/3 Sr 1/3 NiO 4 (LSNO-1/3; Ni 2.33+ ), with orientation at 45°to the Ni-O bonds. The charge stripes in La-438 are weakly correlated along c to form a staggered ABAB stacking that reduces the Coulomb repulsion among the stripes. Surprisingly, however, we find that the charge stripes within each trilayer of La-438 are stacked in phase from one layer to the next, at odds with any simple Coulomb repulsion argument.charge stripe | charge order | nickelate | strongly correlated materials | transition metal oxides C ompetition between localized and itinerant electron behavior is an organizing construct in our understanding of correlated electron transition metal oxide (TMO) physics (1-4). Some of the most compelling phenomenology in these materials occurs in the mixed valent state for the transition metal, which is set by composition, doping, and anion coordination of the metal. Many mixed valent TMOs adopt insulating "charge ordered" states, in which an inhomogeneous but long-range ordered configuration of the charge density condenses from a uniform metallic state (5). The real space pattern of charge order varies by material (6-9), but a typically observed motif is some variety of charge stripes. Such stripes have been observed in cobaltites (10-12), cuprates (13-15), nickelates (16)(17)(18)(19), and manganites (20-22), albeit with highly materials-dependent configurations that hinge on a balance among Coulomb, lattice, and magnetic exchange energies. For instance, charge stripes in layered nickelates typically stagger themselves from layer to layer to reduce the collective electrostatic energy arising from the charge disproportionation (9, 18).Indeed, the case of nickelates plays a prominent role in charge stripe physics (6-9, 16-19, 23-28), because mixed valent Ni 2+ (d 8 ) and Ni 3+ (d 7 ) compounds, such as La 2 − x Sr x NiO 4 (LSNO), are structurally and electronically related to high T c superconductors and thus, have been targeted as potential alternatives to the cuprates. Instead of superconductivity, however, the ground state of such quasi-2D, octahedrally coordinated nickelates is marked by stati...

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Neutron Diffraction Study of La3Ni2O7: Structural Relationships Among n=1, 2, and 3 Phases Lan+1NinO3n+1

Cited by 80 publications

References 14 publications

Thermodynamic analysis of the ternary La–Ni–O system

Thermodynamic analysis of the ternary La–Ni–O system

Stability and thermodynamic functions of lanthanum nickelates

Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈

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Neutron Diffraction Study of La3Ni2O7: Structural Relationships Among n=1, 2, and 3 Phases Lan+1NinO3n+1

Cited by 80 publications

References 14 publications

Thermodynamic analysis of the ternary La–Ni–O system

Thermodynamic analysis of the ternary La–Ni–O system

Stability and thermodynamic functions of lanthanum nickelates

Stacked charge stripes in the quasi-2D trilayer nickelate La 4 Ni 3 O 8

Contact Info

Product

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Stacked charge stripes in the quasi-2D trilayer nickelate La ₄ Ni ₃ O ₈