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Title: Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect

Abstract

First-order magnetic transitions (FOMTs) with a large discontinuity in magnetization are highly sought in the development of advanced functional magnetic materials. Isosymmetric magnetoelastic FOMTs that do not perturb crystal symmetry are especially rare, and only a handful of material families, almost exclusively transition metal-based, are known to exhibit them. Yet, here we report a surprising isosymmetric FOMT in a rare-earth intermetallic, Eu2In. What makes this transition in Eu 2In even more remarkable is that it is associated with a large latent heat and an exceptionally high magnetocaloric effect in low magnetic fields, but with tiny lattice discontinuities and negligible hysteresis. Finally, an active role of the Eu-5d and In-4p states and a rather unique electronic structure borne by In to Eu charge transfer, altogether result in an unusual exchange mechanism that both sets the transition in motion and unveils an approach toward developing specific magnetic functionalities ad libitum.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [2];  [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1464472
Report Number(s):
IS-J-9693
Journal ID: ISSN 2041-1723; PII: 5268
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Guillou, F., Pathak, A. K., Paudyal, D., Mudryk, Y., Wilhelm, F., Rogalev, A., and Pecharsky, V. K. Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05268-4.
Guillou, F., Pathak, A. K., Paudyal, D., Mudryk, Y., Wilhelm, F., Rogalev, A., & Pecharsky, V. K. Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect. United States. doi:10.1038/s41467-018-05268-4.
Guillou, F., Pathak, A. K., Paudyal, D., Mudryk, Y., Wilhelm, F., Rogalev, A., and Pecharsky, V. K. Thu . "Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect". United States. doi:10.1038/s41467-018-05268-4. https://www.osti.gov/servlets/purl/1464472.
@article{osti_1464472,
title = {Non-hysteretic first-order phase transition with large latent heat and giant low-field magnetocaloric effect},
author = {Guillou, F. and Pathak, A. K. and Paudyal, D. and Mudryk, Y. and Wilhelm, F. and Rogalev, A. and Pecharsky, V. K.},
abstractNote = {First-order magnetic transitions (FOMTs) with a large discontinuity in magnetization are highly sought in the development of advanced functional magnetic materials. Isosymmetric magnetoelastic FOMTs that do not perturb crystal symmetry are especially rare, and only a handful of material families, almost exclusively transition metal-based, are known to exhibit them. Yet, here we report a surprising isosymmetric FOMT in a rare-earth intermetallic, Eu2In. What makes this transition in Eu2In even more remarkable is that it is associated with a large latent heat and an exceptionally high magnetocaloric effect in low magnetic fields, but with tiny lattice discontinuities and negligible hysteresis. Finally, an active role of the Eu-5d and In-4p states and a rather unique electronic structure borne by In to Eu charge transfer, altogether result in an unusual exchange mechanism that both sets the transition in motion and unveils an approach toward developing specific magnetic functionalities ad libitum.},
doi = {10.1038/s41467-018-05268-4},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {7}
}

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