Structural and magnetic transitions in spinel single crystals
Abstract
Materials that form the spinel structure are known to exhibit geometric frustration, which can lead to magnetic frustration as well. Through magnetization and neutron diffraction measurements, we find that FeMn2O4 undergoes one structural and two magnetic transitions. The structural transition occurs at Ts ~595K from cubic at high temperatures to tetragonal at low temperatures. Here, two magnetic transitions are ferrimagnetic at TFI–1 ~373K and TFI–2 ~50K, respectively. Further investigation of the specific heat, thermal conductivity, and Seebeck coefficient confirms both magnetic transitions. Of particular interest is that there is a significant magnetic contribution to the low-temperature specific heat and thermal conductivity, providing a unique system to study heat transport by magnetic excitations.
- Authors:
-
- Louisiana State Univ., Baton Rouge, LA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1440814
- Alternate Identifier(s):
- OSTI ID: 1416624
- Grant/Contract Number:
- AC05-00OR22725; SC0016315; SC0012432
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 97; Journal Issue: 2; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Nepal, Roshan, Zhang, Qiang, Dai, Samuel, Tian, Wei, Nagler, Stephen E., and Jin, Rongying. Structural and magnetic transitions in spinel FeMn2O4 single crystals. United States: N. p., 2018.
Web. doi:10.1103/PhysRevB.97.024410.
Nepal, Roshan, Zhang, Qiang, Dai, Samuel, Tian, Wei, Nagler, Stephen E., & Jin, Rongying. Structural and magnetic transitions in spinel FeMn2O4 single crystals. United States. https://doi.org/10.1103/PhysRevB.97.024410
Nepal, Roshan, Zhang, Qiang, Dai, Samuel, Tian, Wei, Nagler, Stephen E., and Jin, Rongying. Thu .
"Structural and magnetic transitions in spinel FeMn2O4 single crystals". United States. https://doi.org/10.1103/PhysRevB.97.024410. https://www.osti.gov/servlets/purl/1440814.
@article{osti_1440814,
title = {Structural and magnetic transitions in spinel FeMn2O4 single crystals},
author = {Nepal, Roshan and Zhang, Qiang and Dai, Samuel and Tian, Wei and Nagler, Stephen E. and Jin, Rongying},
abstractNote = {Materials that form the spinel structure are known to exhibit geometric frustration, which can lead to magnetic frustration as well. Through magnetization and neutron diffraction measurements, we find that FeMn2O4 undergoes one structural and two magnetic transitions. The structural transition occurs at Ts ~595K from cubic at high temperatures to tetragonal at low temperatures. Here, two magnetic transitions are ferrimagnetic at TFI–1 ~373K and TFI–2 ~50K, respectively. Further investigation of the specific heat, thermal conductivity, and Seebeck coefficient confirms both magnetic transitions. Of particular interest is that there is a significant magnetic contribution to the low-temperature specific heat and thermal conductivity, providing a unique system to study heat transport by magnetic excitations.},
doi = {10.1103/PhysRevB.97.024410},
journal = {Physical Review B},
number = 2,
volume = 97,
place = {United States},
year = {Thu Jan 11 00:00:00 EST 2018},
month = {Thu Jan 11 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
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