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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 670767.0, MPI für Chemische Physik fester Stoffe / publications 2013
Discovery of a Superhard Iron Tetraboride Superconductor
Authors:Gou, H. Y.; Dubrovinskaia, N.; Bykova, E.; Tsirlin, A. A.; Kasinathan, D.; Schnelle, W.; Richter, A.; Merlini, M.; Hanfland, M.; Abakumov, A. M.; Batuk, D.; Van Tendeloo, G.; Nakajima, Y.; Kolmogorov, A. N.; Dubrovinsky, L.
Language:English
Date of Publication (YYYY-MM-DD):2013-10-07
Title of Journal:Physical Review Letters
Volume:111
Issue / Number:15
Start Page:157002-1
End Page:157002-5
Sequence Number of Article:157002
Review Status:not specified
Audience:Not Specified
Abstract / Description:Single crystals of novel orthorhombic (space group Pnnm) iron tetraboride FeB4 were synthesized at pressures above 8 GPa and high temperatures. Magnetic susceptibility and heat capacity measurements demonstrate bulk superconductivity below 2.9 K. The putative isotope effect on the superconducting critical temperature and the analysis of specific heat data indicate that the superconductivity in FeB4 is likely phonon mediated, which is rare for Fe-based superconductors. The discovered iron tetraboride is highly incompressible and has the nanoindentation hardness of 62(5) GPa; thus, it opens a new class of highly desirable materials combining advanced mechanical properties and superconductivity.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000325371500011 [ID No:1]
ISSN:0031-9007 [ID No:2]
DOI:10.1103/PhysRevLett.111.157002
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