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Frustrated Magnetism In The Tetragonal Cose Analog Of Superconducting Fese

Title: Frustrated Magnetism In The Tetragonal Cose Analog Of Superconducting Fese.
Name(s): Wilfong, Brandon, author
Zhou, Xiuquan, author
Vivanco, Hector, author
Campbell, Daniel J., author
Wang, Kefeng, author
Graf, Dave, author
Paglione, Johnpierre, author
Rodriguez, Efrain, author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-03-08
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Recently synthesized metastable tetragonal CoSe, isostructural to the FeSe superconductor, offers a new avenue for investigating systems in close proximity to the iron-based superconductors. We present magnetic and transport property measurements on powders and single crystals of CoSe. High field magnetic susceptibility measurements indicate a suppression of the previously reported 10 K ferromagnetic transition with the magnetic susceptibility, exhibiting time dependence below the proposed transition. Dynamic scaling analysis of the time dependence yields a critical relaxation time of tau* = 0.064 +/- 0.008 s which in turn yields activation energy E-a(*) = 14.84 +/- 0.59 K and an ideal glass temperature T-0(*) = 8.91 +/- 0.09 K from Vogel-Fulcher analysis. No transition is observed in resistivity and specific heat measurements, but both measurements indicate that CoSe is metallic. These results are interpreted on the basis of CoSe exhibiting frustrated magnetic ordering arising from competing magnetic interactions. Arrott analysis of single crystal magnetic susceptibility has indicated the transition temperature occurs in close proximity to previous reports and that the magnetic moment lies solely in the ab plane. The results have implications for understanding the relationship between magnetism and transport properties in the iron chalcogenide superconductors.
Identifier: FSU_libsubv1_wos_000426901700002 (IID), 10.1103/PhysRevB.97.104408 (DOI)
Keywords: dynamics, transition, chalcogenides, total-energy calculations, heat-capacity, high-temperature superconductivity, nematicity, spin-glasses, square lattice, wave basis-set
Publication Note: The publisher's version of record is available at
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Host Institution: FSU
Is Part Of: Physical Review B.
Issue: iss. 10, vol. 97

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Wilfong, B., Zhou, X., Vivanco, H., Campbell, D. J., Wang, K., Graf, D., … Rodriguez, E. (2018). Frustrated Magnetism In The Tetragonal Cose Analog Of Superconducting Fese. Physical Review B. Retrieved from