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Title: Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

In this work, we review single mode SiO 2 fiber Bragg grating techniques for dilatometry studies of small single-crystalline samples in the extreme environments of very high, continuous, and pulsed magnetic fields of up to 150 T and at cryogenic temperatures down to <1 K. Distinct millimeter-long materials are measured as part of the technique development, including metallic, insulating, and radioactive compounds. Experimental strategies are discussed for the observation and analysis of the related thermal expansion and magnetostriction of materials, which can achieve a strain sensitivity (ΔL/L) as low as a few parts in one hundred million (≈10 -8). The impact of experimental artifacts, such as those originating in the temperature dependence of the fiber’s index of diffraction, light polarization rotation in magnetic fields, and reduced strain transfer from millimeter-long specimens, is analyzed quantitatively using analytic models available in the literature. We compare the experimental results with model predictions in the small-sample limit, and discuss the uncovered discrepancies.
ORCiD logo [1] ;  [2] ; ORCiD logo [3] ;  [1] ;  [1] ;  [3] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1] ;  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Gerencia de Materiales, Comision Nacional de Energia Atomica (Argentina); Consejo Nacional de Investigaciones Científicas y Tecnicas (Argentina); Universidad Nacional Tres de Febrero (Argentina)
  3. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  4. Laboratoire de Cristallographie et Sciences des Materiaux, Normandie Universite, Ecole Nationale Superieure d Ingenieurs de Caen, Universite de Caen Normandie, Centre National de la Recherche Scientifique (France)
Publication Date:
Report Number(s):
Journal ID: ISSN 1424-8220; SENSC9
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 17; Journal Issue: 11; Journal ID: ISSN 1424-8220
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; single-mode fiber Bragg gratings; FBG; large pulsed magnetic fields; superconducting magnets; magnetostriction; thermal expansion; quantum oscillations; phase transitions
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