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Title: Digital lock-in detection of site-specific magnetism in magnetic materials

Abstract

The polarization and diffraction characteristics of x-rays incident upon a magnetic material are manipulated to provide a desired magnetic sensitivity in the material. The contrast in diffracted intensity of opposite helicities of circularly polarized x-rays is measured to permit separation of magnetic signals by element type and by atomic environment. This allows for the direct probing of magnetic signals from elements of the same species in nonequivalent atomic environments to better understand the behavior and characteristics of permanent magnetic materials. By using known crystallographic information together with manipulation of the polarization of x-rays having energies tuned near element-specific electronic excitations and by detecting and comparing the incident and diffracted photons at the same frequency, more accurate magnetic measurements can be made over shorter observation periods.

Inventors:
 [1];  [1];  [2]
  1. Naperville, IL
  2. Oak Park, IL
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
943335
Patent Number(s):
7403592
Application Number:
11/447,511
Assignee:
The United States of America as represented by the Department of Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Haskel, Daniel, Lang, Jonathan C, and Srajer, George. Digital lock-in detection of site-specific magnetism in magnetic materials. United States: N. p., 2008. Web.
Haskel, Daniel, Lang, Jonathan C, & Srajer, George. Digital lock-in detection of site-specific magnetism in magnetic materials. United States.
Haskel, Daniel, Lang, Jonathan C, and Srajer, George. Tue . "Digital lock-in detection of site-specific magnetism in magnetic materials". United States. https://www.osti.gov/servlets/purl/943335.
@article{osti_943335,
title = {Digital lock-in detection of site-specific magnetism in magnetic materials},
author = {Haskel, Daniel and Lang, Jonathan C and Srajer, George},
abstractNote = {The polarization and diffraction characteristics of x-rays incident upon a magnetic material are manipulated to provide a desired magnetic sensitivity in the material. The contrast in diffracted intensity of opposite helicities of circularly polarized x-rays is measured to permit separation of magnetic signals by element type and by atomic environment. This allows for the direct probing of magnetic signals from elements of the same species in nonequivalent atomic environments to better understand the behavior and characteristics of permanent magnetic materials. By using known crystallographic information together with manipulation of the polarization of x-rays having energies tuned near element-specific electronic excitations and by detecting and comparing the incident and diffracted photons at the same frequency, more accurate magnetic measurements can be made over shorter observation periods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {7}
}

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Works referenced in this record:

Magnetic properties of transition-metal multilayers studied with X-ray magnetic circular dichroism spectroscopy
journal, January 1998


X-ray magnetic circular dichroism—a high energy probe of magnetic properties
journal, January 2005