Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Sensors

George Rodriguez¹  Priscila F. S. Rosa²  Carolina Corvalán Moya³  Ramzy Daou⁴  Mark Wartenbe⁵  Franziska Weickert⁵  Jonathan B. Betts⁶  Scott A. Crooker⁶  Fedor F. Balakirev⁶  Marcelo Jaime⁶  Vivien Zapf⁶ 

[1] Center for Integrated Nanotechnologies Group, Materials, Physics, and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;Condensed Matter and Magnet Science Group, Materials, Physics, and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;Laboratoire de Cristallographie et Sciences des Matériaux, Normandie Université, Ecole Nationale Supérieure d'Ingénieurs de Caen, Université de Caen Normandie, Centre National de la Recherche Scientifique, 14050 Caen, France;National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA;National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;

关键词: single-mode fiber Bragg gratings;    FBG;    large pulsed magnetic fields;    superconducting magnets;    magnetostriction;    thermal expansion;    quantum oscillations;    phase transitions;   

DOI  :  10.3390/s17112572

来源: DOAJ

【 摘 要 】

In this work, we review single mode SiO2 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.

【 授权许可】

Unknown