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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
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Magnetic structure determination and refinement using FullProf.

Juan Rodriguez-Carvajal1, Javier Gonzalez-Platas2, Nebil A Katcho1

  • 1Diffraction and Computing for Science Groups, Institut Laue Langevin (ILL), 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France.

Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
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Summary
This summary is machine-generated.

Magnetic structure analysis, crucial for condensed matter physics, is gaining importance. This paper reviews methods and highlights the FullProf Suite for analyzing magnetic neutron diffraction data.

Keywords:
incommensurate magnetic structuresmagnetic (super)space groupsmagnetic crystallographysimulated annealingsymmetry modes

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Area of Science:

  • Crystallography
  • Condensed Matter Physics
  • Magnetism

Background:

  • Magnetic structure analysis is a niche field lacking standardized methodologies.
  • The growing importance of topological materials, multiferroics, and skyrmions necessitates better understanding of magnetic ordering.
  • Specialized techniques like neutron diffraction are key, but analysis methods require unification.

Purpose of the Study:

  • To review common methods for describing magnetic structures.
  • To highlight the capabilities of the FullProf Suite for magnetic neutron diffraction data analysis.
  • To address the need for standardized methodologies in magnetic crystallography.

Main Methods:

  • Review of established methods for magnetic structure determination.
  • Demonstration of FullProf Suite's functionalities for analyzing magnetic neutron diffraction data.
  • Discussion of the role of neutron diffraction in characterizing magnetic ordering.

Main Results:

  • Commonly used methods for magnetic structure description are presented.
  • The FullProf Suite is shown to be a capable tool for magnetic neutron diffraction data analysis.
  • The paper underscores the increasing relevance and need for unified approaches in the field.

Conclusions:

  • Standardized methods for magnetic structure analysis are essential for advancing condensed matter physics research.
  • The FullProf Suite offers valuable tools for researchers in this domain.
  • Continued efforts by bodies like the IUCr Commission on Magnetic Structures are vital for progress.