Structural and magnetic properties of the single-layer manganese oxide La{1-x}Sr{1+x}MnO4

Abstract

Using x-ray and neutron scattering, we have studied the structural and magnetic properties of the single-layer manganite La{1-x}Sr{1+x}MnO4 (0 < x < 0.7). Single crystals were grown by the traveling-solvent floating-zone method at 18 La/Sr concentrations. The low-temperature phase diagram can be understood by considering the strong coupling of the magnetic and orbital degrees of freedom, and it can be divided into three distinct regions: low (x < 0.12), intermediate (0.12< x < 0.45), and high (x > 0.45) doping. LaSrMnO_4 (x=0) is an antiferromagnetic Mott insulator,and its spin-wave spectrum is well-described by linear spin-wave theory for the spin-2 square-lattice Heisenberg Hamiltonian with Ising anisotropy. Upon doping, as the e_g electron concentration (1-x) decreases, both the two-dimensional antiferromagnetic spin correlations in the paramagnetic phase and the low-temperature ordered moment decrease due to an increase of frustrating interactions, and Neel order disappears above xc = 0.115(10). In the intermediate region, there exists neither long-range magnetic nor superstructural order. Short-range-correlated structural "nanopatches" begin to form above x ~ 0.25. At high doping (x > 0.45), the ground state of La{1-x}Sr{1+x}MnO4 exhibits long-range superstructural order and a complex (CE-type) antiferromagnetic order which differs from that at low doping. The superstructural order is thought to arise from charge and orbital ordering on the Mn sites. For x > 0.50, the superstructural order becomes incommensurate with the lattice, with a modulation wavevector that depends linearly on the e_g electron concentration. On the other hand, the magnetic order remains commensurate, but loses its long-range coherence upon doping beyond x = 0.50.

21 pages, 29 figures

References in corpus (29)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• The Loop Algorithm
• Orbital ordering, Jahn-Teller distortion, and anomalous X-Ray scattering in Manganates
• Charge Ordering and Polaron Formation in the Magnetoresistive Oxide La0.7Ca0.3MnO3
• "Wigner crystal" and "stripe" models for the magnetic and crystallographic superstructures of La0.333Ca0 .667MnO3
• Charge melting and polaron collapse in $L{a}_{1.2}S{r}_{1.8}M{n}_2{O}_7$
• Stripe order at low temperatures in La{2-x}Sr{x}NiO4 for 1/3 < x < 1/2
• Direct observation of orbital ordering in La${}_{0.5}$Sr${}_{1.5}$MnO${}_4$ using soft x-ray diffraction
• Theory of Anomalous X-ray Scattering in Orbital Ordered Manganites
• Charge Ordering and Phase Competition in the Layered Perovskite Lasr2mn2o7
• Soft x-ray resonant diffraction study of magnetic and orbital correlations in a manganite near half-doping
• Resonant x-ray diffraction study of the magnetoresistant perovskite Pr0.6Ca0.4MnO3
• Glass Transition in the Polaron Dynamics of CMR Manganites
• Nature of Orbital Ordering in La_0.5Sr_1.5MnO_4 is Studied by Soft X-ray Linear Dichroism
• Topological Scenario for Stripe Formation in Manganese Oxides
• Nature of $e_g$ Electron Order in La${}_{1-x}$Sr${}_{1+x}$MnO${}_4$
• Spin, charge and orbital ordering in La0.5Sr1.5MnO4
• On charge and orbital ordering in La0.5Sr1.5MnO4
• Spin Dependence of Correlations in Two-Dimensional Quantum Heisenberg Antiferromagnets
• Infrared response of ordered polarons in layered perovskites
• Spin dynamical properties and orbital states of the layered perovskite La_2-2x_Sr_1+2x_Mn_2_O_7 (0.3 <= x < 0.5)
• An X-Ray Induced Structural Transition in La_0.875Sr_0.125MnO_3
• Topological nature of polarization and charge pumping in ferroelectrics
• Resonant X-ray Scattering in Manganites - Study of Orbital Degree of Freedom -
• Neutron Scattering study of Sr_2Cu_3O_4Cl_2
• Optical Investigations of Charge Gap in Orbital Ordered La1/2Sr3/2MnO4
• Spin Correlations in the Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2MnF4
• Charge Ordering Due to Magnetic Symmetry Breaking
• Magnon Broadening Effects in Double Layered Manganite La_1.2 Sr_1.8 Mn_2 O_7

Cited by in corpus (36)

• Universal Window for Two Dimensional Critical Exponents
• Quantum many-body interactions in digital oxide superlattices
• Neutron scattering studies on stripe phases in non-cuprate materials
• Frustrated phase separation in two-dimensional charged systems
• Microscopic origin of diagonal stripe phases in doped nickelates
• Doping dependence of spin and orbital correlations in layered manganites
• Spin-wave dispersion in orbitally ordered La(0.5)Sr(1.5)MnO(4)
• Spin and charge orders and their hole-doping dependence in single layered cobaltate La2-xCaxCoO4(0.3<x<0.8)
• Structural changes at the semiconductor-insulator phase transition in the single layered La0.5Sr1.5MnO4 perovskite
• Giant Exchange Bias in the Single-layered Ruddlesden-Popper Perovskite SrLaCo0.5Mn0.5O4
• A hard X- ray probe to study doping-dependent electron redistribution and strong covalency in La_{1-x}Sr_{1+x}MnO_4
• Mn L${}_{2,3}$ edge resonant x-ray scattering in manganites: Influence of the magnetic state
• Mott-Hubbard versus charge-transfer behavior in LaSrMnO4 studied via optical conductivity
• Magnetic ordering in the striped nickelate La5/3Sr1/3NiO4: A band structure point of view
• Variation of charge/orbital ordering in layered manganites Pr1-xCa1+xMnO4 investigated by transmission electron microscopy
• In-plane anisotropy of the electronic structure for the charge/orbital-ordered state in half-doped manganite with layered structure
• Short-range Charge and Spin Superstructures in Doped Layered Co Perovskites
• Stripeless incommensurate magnetism in a doped strongly correlated oxide
• Magnetic structure and magnon dispersion in LaSrFeO${}_4$
• Surface effects on the orbital order in the single layered manganite La0.5Sr1.5MnO4
• Melting of magnetic correlations in charge-orbital ordered La(0.5)Sr(1.5)MnO(4) : competition of ferro and antiferromagnetic states
• Evidence for charge orbital and spin stripe order in an overdoped manganite
• Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr${}_{0.5}$Ca${}_{1.5}$MnO${}_4$
• Cation-ordering effects in the single layered manganite La(2/3)Sr(4/3)MnO4
• Multi-mode excitation drives disorder during the ultrafast melting of a C4-symmetry-broken phase
• Soft vibrational mode associated with incommensurate orbital order in multiferroic CaMn${}_7$O${}_{12}$
• Jahn-Teller distortions and the magnetic order in the perovskite manganites
• Coexistence of long-ranged charge and orbital order and spin-glass state in single-layered manganites with weak quenched disorder
• Logarithmic growth law in the two-dimensional Ising spin glass state resulting from the electron doping in single-layered manganites
• Spin excitations used to probe the nature of the exchange coupling in the magnetically ordered ground state of Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Electronic self-organization in the single-layer manganite $\mathrm{P}{\mathrm{r}}_{1-x}\mathrm{C}{\mathrm{a}}_{1+x}\mathrm{Mn}{\mathrm{O}}_4$
• Surface Melting of Electronic Order
• Signatures of electronic polarons in La${}_{1-x}$Sr${}_{1+x}$MnO${}_4$ observed by electron energy-loss spectroscopy
• Reconciling monolayer and bilayer $J_{\mathrm{eff}}=1/2$ square lattices in hybrid oxide superlattice
• Charge order induced in an orbital density-wave state
• Orbital ordering transition in the single-layer manganites near half doping: a weak-coupling approach