Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Inelastic neutron scattering data analysis method of strong correlation material

A technology of neutron scattering and data analysis, which is used in material analysis using wave/particle radiation, analyzing materials, and complex mathematical operations, and can solve problems such as inability to fit magnetic excitation spectra.

Active Publication Date: 2020-06-23
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When analyzing the experimental data, the traditional crystal field model is no longer applicable, and cannot effectively fit the magnetic excitation spectrum (including peak intensity and peak position)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inelastic neutron scattering data analysis method of strong correlation material
  • Inelastic neutron scattering data analysis method of strong correlation material
  • Inelastic neutron scattering data analysis method of strong correlation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] CeAuAl 3 As an example, a specific analysis method for inelastic neutron scattering data of cerium-based materials is introduced, including the following links:

[0052] a. According to CeAuAl 3 Point symmetry of magnetic ions in: C 4v , using the standard Stephen's formula to write the crystal-field Hamiltonian: (step 1), where is the crystal field parameter, Is the Stephen operator, the diagonalization of the crystal field Hamiltonian H is calculated to obtain the eigenvalue A α and eigenvectors (step 2),

[0053] Eigenvalue A α :

[0054] A 1 =-10.0184,

[0055] A 2 =-4.84099,

[0056] A 3 =14.8594

[0057] eigenvector

[0058]

[0059]

[0060]

[0061]

[0062]

[0063]

[0064] Among them, the subscript α indicates the multiplicity, and the superscript m indicates the degeneracy;

[0065] The eigenvalue A obtained based on (a) α and eigenvectors according to the formula Calculate the phonon contribution, where, is t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an inelastic neutron scattering data analysis method for a strong correlation material, and the method comprises the following steps: (a) diagonalizing the Hamiltonian quantityof a conventional crystal field, and calculating an eigenvalue A and an eigenvector A; (b) diagonalizing the total Hamiltonian quantity by integrating phonon contribution and magnetoelastic coupling interaction factors, and calculating an eigenvalue B and an eigenvector B; (c) calculating a matrix element according to the eigenvector B obtained in the step (b); and (d) calculating a neutron scattering function according to the eigenvalue B obtained in the step (b) and the matrix element obtained in the step (c), and fitting neutron scattering experimental data to obtain a magnetoelastic coupling coefficient g. The method is suitable for fitting the non-elastic neutron scattering data observed above the magnetic phase transition temperature of the strongly correlated material, and can be used for analyzing the crystal field excitation and phonon coupling phenomenon in the material.

Description

technical field [0001] The invention belongs to the technical field of magnetic property analysis and measurement in strongly correlated electronic materials, and in particular relates to a method for analyzing experimental data of inelastic neutron scattering of strongly correlated materials. Background technique [0002] Various elementary excitations in materials, such as single-ion crystal field excitations, phonons, can be detected using inelastic neutron scattering techniques. Although these two meta-excitations have similar energy scales, there is usually no coupling between them, so the two phenomena, crystal field energy levels and phonon dispersion relations, are studied separately. However, in strongly correlated electronic materials, there may be coupling between the local electron spin or orbital degree of freedom and the phonon, that is, the coupling between the crystal field excitation and the phonon. At this time, in the magnetic excitation spectrum measured...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F17/11G01N23/202
CPCG06F17/11G01N23/202
Inventor 刘本琼庞蓓蓓宋建明李鑫胡丙锋黄朝强孙光爱
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com