LaSrNi4 spin excitationsLaSrNiO4自旋激发.pptVIP

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2018-06-19 发布于福建
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LaSrNi4 spin excitationsLaSrNiO4自旋激发.ppt

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LaSrNi4 spin excitationsLaSrNiO4自旋激发

Neutron and X-ray Scattering Studies ofSpin, Charge and Orbital Order in TM Oxides Transition Metal Oxide Research in Oxford Physics Department Crystal growth — floating-zone method Oxford single crystals of TM oxides Neutron scattering studies of stripe-ordered nickelates Outline Stripe order in La2–xSrxNiO4 Neutron Diffraction Neutron diffraction Polarized neutron scattering Advantages of polarized neutron scatteringfor studying complex order Spin charge order in La3/2Sr1/2NiO4 Models for spin-charge order in La3/2Sr1/2NiO4 Spin reorientations Overview of spin dynamics in La2–xSrxNiO4 Low energy quasi-1D spin fluctuation in La5/3Sr1/3NiO4 Soft X-ray scattering studies of manganates X-ray Scattering Examples of X-ray resonant magnetic scattering X-ray resonant scattering from Mn Daresbury Laboratory Soft X-ray scattering at 5U1, SRS Soft X-ray resonant scattering from La2–2xSr1+2xMn2O7 (x = 0.45) Orbital ordering in La0.5Sr1.5MnO4 Soft X-ray scattering theory Conclusions * Andrew Boothroyd Department of Physics, Oxford University magnetization resistivity La5/3Sr1/3NiO4 Sample Preparation lab. Single Crystals Dr Prabhakaran Neutron Scattering Dr Boothroyd Dr Coldea Prof Cowley Muon-spin Rotation Dr Blundell X-ray scattering Dr Hatton (Durham) Prof Cowley Characterization Magnetization Transport etc Image furnace (Clarendon Laboratory) La5/3Sr1/3NiO4 La0.7Sr0.3MnO3 CoNb2O6 La3/2Sr1/2CoO4 Na0.7CoO2 D. Prabhakaran Oxford University Paul Freeman ￠￠￠￠ ? Mechthild Enderle Institut Laue-Langevin Jiri Kulda ￠￠ Arno Hiess ￠￠ Louis-Pierre Regnault CEA, Grenoble, Felix Altorfer Paul-Scherrer Institut, Switzerland Christof Niedermayer ￠￠￠￠ Chris Frost ISIS Hyungje Woo Brookhaven National Lab/ISIS Kenji Nakajima University of Tokyo John Tranquada Brookhaven National Lab collaborators Overview of stripe phenomena in La2–xSrxNiO4 What can be learned by n