{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,17]],"date-time":"2026-03-17T08:47:18Z","timestamp":1773737238103,"version":"3.50.1"},"reference-count":27,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2017,11,4]],"date-time":"2017-11-04T00:00:00Z","timestamp":1509753600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["DMR-1157490"],"award-info":[{"award-number":["DMR-1157490"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100008902","name":"Los Alamos National Laboratory","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008902","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We report on an optical technique for measuring thermal expansion and magnetostriction at cryogenic temperatures and under applied hydrostatic pressures of 2.0 GPa. Optical fiber Bragg gratings inside a clamp-type pressure chamber are used to measure the strain in a millimeter-sized sample of CeRhIn5. We describe the simultaneous measurement of two Bragg gratings in a single optical fiber using an optical sensing instrument capable of resolving changes in length [dL\/L = (L\u2212 L0)\/L0] on the order of 10\u22127. Our results demonstrate the possibility of performing high-resolution thermal expansion measurements under hydrostatic pressure, a capability previously hindered by the small working volumes typical of pressure cells.<\/jats:p>","DOI":"10.3390\/s17112543","type":"journal-article","created":{"date-parts":[[2017,11,6]],"date-time":"2017-11-06T11:39:38Z","timestamp":1509968378000},"page":"2543","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["An FBG Optical Approach to Thermal Expansion Measurements under Hydrostatic Pressure"],"prefix":"10.3390","volume":"17","author":[{"given":"Priscila","family":"Rosa","sequence":"first","affiliation":[{"name":"Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, USA"}]},{"given":"Sean","family":"Thomas","sequence":"additional","affiliation":[{"name":"Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, USA"}]},{"given":"Fedor","family":"Balakirev","sequence":"additional","affiliation":[{"name":"National High Magnetic Field Laboratory, Los Alamos National Laboratory, MS E536, Los Alamos, NM 87545, USA"}]},{"given":"Jon","family":"Betts","sequence":"additional","affiliation":[{"name":"National High Magnetic Field Laboratory, Los Alamos National Laboratory, MS E536, Los Alamos, NM 87545, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9726-1749","authenticated-orcid":false,"given":"Soonbeom","family":"Seo","sequence":"additional","affiliation":[{"name":"Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, USA"}]},{"given":"Eric","family":"Bauer","sequence":"additional","affiliation":[{"name":"Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, USA"}]},{"given":"Joe","family":"Thompson","sequence":"additional","affiliation":[{"name":"Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5360-5220","authenticated-orcid":false,"given":"Marcelo","family":"Jaime","sequence":"additional","affiliation":[{"name":"National High Magnetic Field Laboratory, Los Alamos National Laboratory, MS E536, Los Alamos, NM 87545, USA"},{"name":"Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, NM 87545, USA"}]}],"member":"1968","published-online":{"date-parts":[[2017,11,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1021","DOI":"10.1140\/epjst\/e2015-02444-5","article-title":"Critical elasticity at zero and finite temperature","volume":"224","author":"Zacharias","year":"2015","journal-title":"Eur. 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