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Title: Structural and magnetic transitions in spinel FeM n 2 O 4 single crystals

Journal Article · · Physical Review B

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC0016315; SC0012432
OSTI ID:
1440814
Alternate ID(s):
OSTI ID: 1416624
Journal Information:
Physical Review B, Vol. 97, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (3)

Structural and magnetic properties of CoMn2O4 synthesized by auto combustion method journal November 2018
MnFe 0.5 Ru 0.5 O 3 : an above-room-temperature antiferromagnetic semiconductor journal January 2019
Nanowires assembled from iron manganite nanoparticles: Synthesis, characterization, and investigation of electrocatalytic properties for water oxidation reaction journal July 2019

Figures / Tables (4)


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