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Title: A novel approach for x-ray scattering experiments in magnetic fields utilizing trapped flux in type-II superconductors

Abstract

We introduce a novel approach to x-ray scattering studies in applied magnetic fields by exploiting vortices in superconductors. This method is based on trapping magnetic flux in a small disk-shaped superconductor (known as a trapped field magnet, TFM) with a single-crystal sample mounted on or at close proximity to its surface. This opens an unrestricted optical access to the sample and allows magnetic fields to be applied precisely along the x-ray momentum transfer, facilitating polarization-sensitive experiments that have been impractical or impossible to perform to date. The TFMs used in our study remain stable and provide practically uniform magnetic fields for days, which are sufficient for comprehensive x-ray diffraction experiments, specifically x-ray resonance exchange scattering (XRES) to study field-induced phenomena at a modern synchrotron source. The TFM instrument has been used in a “proof-of-principle” XRES study of a meta-magnetic phase in a rare-earth compound, TbNi2Ge2, in order to demonstrate its potential.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1052100
Report Number(s):
IS-J 7768
Journal ID: 0034-6748
DOE Contract Number:  
DE-AC02-07CH11358
Resource Type:
Journal Article
Journal Name:
AIP Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Das, R.K., Islan, Z., Ruff, J.P.C., Sawh, R.P., Weinstein, R., Canfield, Paul C., Kim, J.-W., and Lang, J.C. A novel approach for x-ray scattering experiments in magnetic fields utilizing trapped flux in type-II superconductors. United States: N. p., 2012. Web. doi:10.1063/1.4725523.
Das, R.K., Islan, Z., Ruff, J.P.C., Sawh, R.P., Weinstein, R., Canfield, Paul C., Kim, J.-W., & Lang, J.C. A novel approach for x-ray scattering experiments in magnetic fields utilizing trapped flux in type-II superconductors. United States. doi:10.1063/1.4725523.
Das, R.K., Islan, Z., Ruff, J.P.C., Sawh, R.P., Weinstein, R., Canfield, Paul C., Kim, J.-W., and Lang, J.C. Fri . "A novel approach for x-ray scattering experiments in magnetic fields utilizing trapped flux in type-II superconductors". United States. doi:10.1063/1.4725523.
@article{osti_1052100,
title = {A novel approach for x-ray scattering experiments in magnetic fields utilizing trapped flux in type-II superconductors},
author = {Das, R.K. and Islan, Z. and Ruff, J.P.C. and Sawh, R.P. and Weinstein, R. and Canfield, Paul C. and Kim, J.-W. and Lang, J.C.},
abstractNote = {We introduce a novel approach to x-ray scattering studies in applied magnetic fields by exploiting vortices in superconductors. This method is based on trapping magnetic flux in a small disk-shaped superconductor (known as a trapped field magnet, TFM) with a single-crystal sample mounted on or at close proximity to its surface. This opens an unrestricted optical access to the sample and allows magnetic fields to be applied precisely along the x-ray momentum transfer, facilitating polarization-sensitive experiments that have been impractical or impossible to perform to date. The TFMs used in our study remain stable and provide practically uniform magnetic fields for days, which are sufficient for comprehensive x-ray diffraction experiments, specifically x-ray resonance exchange scattering (XRES) to study field-induced phenomena at a modern synchrotron source. The TFM instrument has been used in a “proof-of-principle” XRES study of a meta-magnetic phase in a rare-earth compound, TbNi2Ge2, in order to demonstrate its potential.},
doi = {10.1063/1.4725523},
journal = {AIP Review of Scientific Instruments},
number = 6,
volume = 83,
place = {United States},
year = {2012},
month = {6}
}