Spin Polarized Inelastic Neutron Scattering NIST Summer School on Neutron Spectroscopy Seung-Hun Lee Peter Gehring Sungil Park Alina Visinoiu Gokhan Caliskan.

Slides:

Advertisements

Similar presentations

Exploring Quantum Magnetism through Neutron Scattering  What is Quantum Magnetism?  Where do we find it?  Why is it interesting?  Summary & Prospects.

Advertisements

Spin dynamics of stripe-ordered layered nickelates Andrew Boothroyd Department of Physics, Oxford University Ni 2+ (S=1) Ni 3+ (S=1/2) Cu 2+ (S=1/2) Cu.

Inelastic Magnetic Neutron Scattering on the Spin-Singlet Spin- ½ FCC System Ba 2 YMoO 6 Jeremy P. Carlo Canadian Neutron Beam Centre, National Research.

V. Pomjakushin I.M.Frank Laboratory of Neutron Physics, JINR, Dubna In collaboration with: A. Balagurov Frank Laboratory of Neutron Physics, JINR, Dubna.

For energy generation, capture storage and transportation.

Chemical order & disorder in metallic alloy Calculation of Bragg and Diffuse Scattering Correlation length in the Mean-Field approach Correlation Length.

Diagnostics for Benchmarking Experiments L. Van Woerkom The Ohio State University University of California, San Diego Center for Energy Research 3rd MEETING.

Region of maximum conductivity 1% 88% 2%31% 54% 64% 1% Fraction crystallinity Solid polymer electrolytes for lithium ion batteries Janna K. Maranas, Pennsylvania.

Superconductivity Characterized by- critical temperature T c - sudden loss of electrical resistance - expulsion of magnetic fields (Meissner Effect) Type.

Detectors point count detectors linear position-sensitive detectors area detectors energy dispersive detectors point count detectors linear position-sensitive.

Drs. Wei Tian & Yanhui Chen Sep-Dec Main Content Introduction of Nuclear Magnetic Resonance (NMR) Analysis One Dimensional NMRs 1 H NMR 13 C NMR.

 PART Requirements for Spectroscopic Techniques for Polymers 1. High resolution 2. High sensitivity (>1%) 3. High selectivity between molecular.

III. Analytical Aspects Summary Cheetham & Day, Chapters 2, 3 Chemical Characterization of Solid-State Materials Chemical Composition: Bulk, Surface, …

Rotational Ligand Dynamics in Mn[N(CN) 2 ] 2.pyrazine Craig Brown, John Copley Inma Peral and Yiming Qiu NIST Summer School 2003.

Managed by UT-Battelle for the Department of Energy Development of Spin-Echo Scattering Angle Measurement Wai Tung Hal Lee 1, Roger Pynn 1,2, Paul Stonaha.

Ying Chen Los Alamos National Laboratory Collaborators: Wei Bao Los Alamos National Laboratory Emilio Lorenzo CNRS, Grenoble, France Yiming Qiu National.

2003 Summer School NCNR, NIST Gaithersburg, MD Neutron Spin Echo Spectroscopy (NSE) Group A Alina Visinoiu Erick Lawson Gokhan Caliskan Jose Rodriguez.

Dynamics Neutron Scattering and Dan Neumann

Neutron Scattering from Geometrically Frustrated Antiferromagnets Spins on corner-sharing tetrahedra Paramagnetic phase Long Range Ordered phase (ZnCr.

Proposal for a High Intensity Chopper Spectrometer at LANSCE Science requiring high sensitivity neutron spectroscopy Limitations of current instrumentation.

NCNR, NIST Gaithersburg, MD Internet: Neutron Spin Echo Spectroscopy (NSE) Dobrin P. Bossev, Steven.

MACS –a New High Intensity Cold Neutron Spectrometer at NIST February 17, 2003Timothy D. Pike1 Developing MACS A Third Generation Cold Neutron Spectrometer.

Neutron Scattering of Frustrated Antiferromagnets Satisfaction without LRO Paramagnetic phase Low Temperature phase Spin glass phase Long range order Spin.

Solving Impurity Structures Using Inelastic Neutron Scattering Quantum Magnetism - Pure systems - vacancies - bond impurities Conclusions Collin Broholm*

Choosing the Right Neutron Spectrometer Dan Neumann NIST Center for Neutron Research

Why Diffraction, Why Neutrons? J. A. Dura Neutron Small Angle Scattering and Reflectometry NCNR Summer School on June 26, 2006.

 Magnetism and Neutron Scattering: A Killer Application  Magnetism in solids  Bottom Lines on Magnetic Neutron Scattering  Examples Magnetic Neutron.

Building MACS  Goals of the MACS project  Funding and time line  Technical overview  Possible IDG contributions  Process for IDG involvement in MACS.

Managed by UT-Battelle for the Department of Energy Polarized 3 He Filling Stations Xin Tong (Tony) Instrument Development Group Neutron Facilities Development.

Introduction to Neutron Scattering Jason T. Haraldsen Advanced Solid State II 2/27/2007.

Resonant magnetic x-ray scattering and Summary Resonant scattering –Why do it? –What is it? –How is it done? –Example(s) The Real World …. CaFe 2 As 2.

1 Data Acquisition What choices need to be made?.

Center for Materials for Information Technology an NSF Materials Science and Engineering Center Scattering Techniques Lecture 17 G.J. Mankey

Finite Temperature Spin Correlations in Quantum Magnets with a Spin Gap Collin Broholm* Johns Hopkins University and NIST Center for Neutron Research *supported.

Probing magnetism in geometrically frustrated materials using neutron scattering Jeremy P. Carlo In conjunction with B. D. Gaulin, J. J. Wagman, J. P.

MACS Concept and Project Status Making best use of CW source MACS-imizing incident flux MACS-imizing detection efficiency From concept to reality Collin.

Self-Organizations in Frustrated Spinels Seung-Hun Lee National Institute of Standards and Technology.

The NCNR Spin-Polarized Triple-Axis Spectrometer (SPINS) The SPINS instrument is located at the heart of the cold neutron guide hall of the NIST Center.

The Magnetic phase transition in the frustrated antiferromagnet ZnCr 2 O 4 using SPINS Group B Ilir Zoto Tao Hong Yanmei Lan Nikolaos Daniilidis Sonoko.

Shielding Helium Cold neutron source Shutter Cooled filters Radial Collimators Variable Aperture Focusing monochromator on translation stage Focusing monochromator.

Introduction to Molecular Magnets Jason T. Haraldsen Advanced Solid State II 4/17/2007.

Quantum Rotational Dynamics of CH 3 I Group D Y Liu, S Jonas, V Atakan, H Wu, S Omar-Diallo, I-K. Jeong D. Phelan.

Collin Broholm Johns Hopkins University and NIST Center for Neutron Research Quantum Phase Transition in a Quasi-two-dimensional Frustrated Magnet M. A.

The Structure and Dynamics of Solids

MACS –a New High Intensity Cold Neutron Spectrometer at NIST September 24, 2002Collin L. Broholm Timothy D. Pike 1 Scientific Program and Requirements.

Inelastic Scattering: Neutrons vs X-rays Stephen Shapiro Condensed Matter Physics/Materials Science February 7,2008.

Conceptual design and performance of high throughput cold spectrometer : MACS Why MACS Layout and key elements Performance Data collection Scientific program.

Cold Neutron Spectroscopy on MACS  Virtues and limitations of INS  Enhancing INS at the NCNR  Description of MACS  Science on MACS  Integration of.

Magnetic Frustration at Triple-Axis  Magnetism, Neutron Scattering, Geometrical Frustration  ZnCr 2 O 4 : The Most Frustrated Magnet How are the fluctuating.

Past and Future Insights from Neutron Scattering Collin Broholm * Johns Hopkins University and NIST Center for Neutron Research  Virtues and Limitations.

Collin Broholm * Johns Hopkins University and NIST Center for Neutron Research Y. ChenJHU, Baltimore, USA M. EnderleILL, Grenoble, France Z. HondaRiken,

Magnetized States of Quantum Spin Chains

J.S. Colton, Universal scheme for opt.-detected T 1 measurements Universal scheme for optically- detected T 1 measurements (…and application to an n =

Parameters of the new diffractometer TEX Responsible: Yu.Kibalin, I.Golosovsky.

8:4. THE MASTER FORMULA OF NEUTRON SCATTERING 8:5. THE VARIOUS STRUCTURE FACTORS Chapter 8 - ELASTIC AND QUASIELASTIC/ INELASTIC NEUTRON SCATTERING.

Collin Broholm Johns Hopkins University and NIST Center for Neutron Research Quantum Phase Transition in Quasi-two-dimensional Frustrated Magnet M. A.

Brookhaven Science Associates U.S. Department of Energy Chi-Chang Kao National Synchrotron Light Source Brookhaven National Laboratory Recent Developments.

Excitations in an alternating spin-1/2 chain  Why study an alternating spin chain?  Excitations for T=0  Propagating triplet mode  Triplet pair excitations.

Neutron Scattering of Frustrated Antiferromagnets Satisfaction without LRO Paramagnetic phase Low Temperature phases Spin glass phase Long range order.

10/24/01PPHMF-IV1 Spinons, Solitons, and Breathers in Quasi-one-dimensional Magnets Frustrated Magnetism & Heavy Fermions Collin Broholm Johns Hopkins.

Fast Sweeping Double Resonance Microwave - (sub)Millimeter Spectrometer Based on Chirped Pulse Technology Brian Hays 1, Susanna Widicus Weaver 1, Steve.

Holes in a Quantum Spin Liquid Collin Broholm * Johns Hopkins University and NIST Center for Neutron Research Y 2-x Ca x BaNiO 5 *supported by the NSF.

One Dimensional Magnetic Systems Strong Fluctuations in Condensed Matter Magnetism in one dimension Pure systems Doped systems Magnetized states Conclusions.

Collin Broholm Johns Hopkins University and NIST Center for Neutron Research Quantum Phase Transition in Quasi-two-dimensional Frustrated Magnet M. A.

Evolution of the orbital Peierls state with doping

Solving Impurity Structures Using Inelastic Neutron Scattering Quantum Magnetism - Pure systems - vacancies - bond impurities Conclusions Collin Broholm*

Optical band gaps from tetrahedral cation vacancy and variation of cation ordering in NCO films Weiwei Zhao.

NICPB, Tallinn, Estonia: R. Stern I. Heinmaa A. Kriisa E. Joon

Inelastic Neutron Scattering Correction

Magnetic Properties of Spin Glass

Presentation transcript:

Spin Polarized Inelastic Neutron Scattering NIST Summer School on Neutron Spectroscopy Seung-Hun Lee Peter Gehring Sungil Park Alina Visinoiu Gokhan Caliskan Erick Lawson Martin Sulic Tessema Guebre Xabiher Kapil Gupta Jose Rodriguez Mike Lewis

O A B Edge-sharing octahedra  CW = -390 K T N = 12.5 K Corner-sharing tetrahedra (B sites) Magnetic Phase Transition in ZnCr 2 O 4 AFM H = -J  S i. S j All exchange interactions can not be satisfied. Magnetic frustration or ZnCr 2 O 4 -Space Group-Fm3d

SPINS Monochromator Sample Analyzer Single Detector Neutron Source Sample Flat Analyzer Position-Sensitive Detector 2i2i aa aiai Increased data acquisition Rate over conventional TAS By an order of magnitude.

Exploring Statics Q(Å -1 ) Intensity Q resolution~0.02 Å -1 Doubling of the unit cell (H,K,L)=(1,1,1) (1/2,1/2,1) (1/2,1/2,3/2)

Order Parameter

Exploring Dynamics

Inelastic Resonance Peak

 -Correlation Length T=15K>T N 0.6meV<E<1.4meV HWHM=  ~0.45Å  ~2.2Å T=1.5K<T N 4.2meV<E<1.4meV HWHM=  ~0.36Å  ~2.8Å

Summary SPINS probes both the static crystal and magnetic state of the system. SPINS probes the dynamic behavior of the system. SPINS is a relatively fast spectroscopy technique. SPINS is ideal for studying specific regions in Q-  space. Acknowledgements: NIST NSF NCNR