Antiferromagnetic and nematic phase transitions in studied by ac microcalorimetry and SQUID magnetometry
Abstract
In this work, we study the antiferromagnetic (AFM) and structural phase transitions in single-crystal at temperatures and , respectively, by high-resolution ac microcalorimetry and SQUID magnetometry. The specific heat measurements of both as-grown and annealed display a sharp peak at the AFM-structural transitions. A kink in the entropy of annealed gives evidence for splitting of the two transitions by approximately 0.5 K. No additional features could be identified in the specific heat of both and in the temperature regions around where torque measurements had revealed the “true” nematic phase transition, even though the Ginzburg-Landau model used to fit the magnetic torque data indicates that the expected thermal anomaly should be easily observable with our experimental resolution.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States); Brown Univ., Providence, RI (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Brown Univ., Providence, RI (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Energy Frontier Research Centers (EFRC) (United States).Center for Nanoscale Materials
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1385581
- Alternate Identifier(s):
- OSTI ID: 1180373
- Grant/Contract Number:
- AC02-98CH10886; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 9; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phonons; thermal conductivity; energy storage (including batteries and capacitors); superconductivity; defects; spin dynamics
Citation Formats
Luo, X., Stanev, V., Shen, B., Fang, L., Ling, X. S., Osborn, R., Rosenkranz, S., Benseman, T. M., Divan, R., Kwok, W.-K., and Welp, U. Antiferromagnetic and nematic phase transitions in BaFe2(As1-xPx)2 studied by ac microcalorimetry and SQUID magnetometry. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.91.094512.
Luo, X., Stanev, V., Shen, B., Fang, L., Ling, X. S., Osborn, R., Rosenkranz, S., Benseman, T. M., Divan, R., Kwok, W.-K., & Welp, U. Antiferromagnetic and nematic phase transitions in BaFe2(As1-xPx)2 studied by ac microcalorimetry and SQUID magnetometry. United States. https://doi.org/10.1103/PhysRevB.91.094512
Luo, X., Stanev, V., Shen, B., Fang, L., Ling, X. S., Osborn, R., Rosenkranz, S., Benseman, T. M., Divan, R., Kwok, W.-K., and Welp, U. Mon .
"Antiferromagnetic and nematic phase transitions in BaFe2(As1-xPx)2 studied by ac microcalorimetry and SQUID magnetometry". United States. https://doi.org/10.1103/PhysRevB.91.094512. https://www.osti.gov/servlets/purl/1385581.
@article{osti_1385581,
title = {Antiferromagnetic and nematic phase transitions in BaFe2(As1-xPx)2 studied by ac microcalorimetry and SQUID magnetometry},
author = {Luo, X. and Stanev, V. and Shen, B. and Fang, L. and Ling, X. S. and Osborn, R. and Rosenkranz, S. and Benseman, T. M. and Divan, R. and Kwok, W.-K. and Welp, U.},
abstractNote = {In this work, we study the antiferromagnetic (AFM) and structural phase transitions in single-crystal BaFe2(As1–xPx)2(x=0,0.3) at temperatures TN and TS, respectively, by high-resolution ac microcalorimetry and SQUID magnetometry. The specific heat measurements of both as-grown and annealed BaFe2As2 display a sharp peak at the AFM-structural transitions. A kink in the entropy of annealed BaFe2As2 gives evidence for splitting of the two transitions by approximately 0.5 K. No additional features could be identified in the specific heat of both BaFe2As2 and BaFe2(As0.7P0.3)2 in the temperature regions around T*>TS where torque measurements had revealed the “true” nematic phase transition, even though the Ginzburg-Landau model used to fit the magnetic torque data indicates that the expected thermal anomaly should be easily observable with our experimental resolution.},
doi = {10.1103/PhysRevB.91.094512},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 9,
volume = 91,
place = {United States},
year = {Mon Mar 23 00:00:00 EDT 2015},
month = {Mon Mar 23 00:00:00 EDT 2015}
}
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