Fe-excess ions as electronic charge suppliers for zero thermal expansion in the normal state of Fe1.16Te0.6Se0.4

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dc.contributor.authorKarna, SKen_AU
dc.contributor.authorLee, CHen_AU
dc.contributor.authorLi, WHen_AU
dc.contributor.authorSankar, Ren_AU
dc.contributor.authorChou, FCen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2021-08-02T04:50:42Zen_AU
dc.date.available2021-08-02T04:50:42Zen_AU
dc.date.issued2015-08-27en_AU
dc.date.statistics2021-07-19en_AU
dc.description.abstractWe report on the observation of a zero thermal expansion of the crystalline lattice of Fe1.16Te0.6Se0.4 in the normal state, using neutron and x-ray diffraction, ac magnetic susceptibility, magnetization and resistivity measurements. Superconductivity develops below 15 K. Magnetic hysteresis loops are revealed at all temperatures studied, with the loop opening at 5 K being noticeably larger than that at 300 K. An extremely large thermal expansion of the lattice is observed in the superconducting state. Thermal expansion coefficients of the lattice are quenched upon loss of superconductivity. Zero thermal expansion is retained over a very broad temperature range from 20 to 200 K. These behaviors are understood as being due to the electronic charge redistribution, in which the excess Fe ions on the interstitial sites act as electronic charge suppliers that strengthen the electronic connections between the Te/Se and Fe ions on the lattice sites once the temperature is raised. ©2015 The Physical Society of Japanen_AU
dc.identifier.articlenumber94713en_AU
dc.identifier.citationKarna, S. K., Lee, C. H., Li, W. H., Sankar, R., Chou, F. C., Avdeev, M. (2015). Fe-excess ions as electronic charge suppliers for zero thermal expansion in the normal state of Fe1.16Te0.6Se0.4. Journal of the Physical Society of Japan, 84, 094713. doi:10.7566/JPSJ.84.094713en_AU
dc.identifier.issn0031-9015en_AU
dc.identifier.journaltitleJournal of the Physical Society of Japanen_AU
dc.identifier.urihttps://doi.org/10.7566/JPSJ.84.094713en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11222en_AU
dc.identifier.volume84en_AU
dc.language.isoenen_AU
dc.publisherThe Physical Society of Japanen_AU
dc.subjectThermal expansionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectSuperconductorsen_AU
dc.subjectMagnetizationen_AU
dc.subjectElectric chargesen_AU
dc.titleFe-excess ions as electronic charge suppliers for zero thermal expansion in the normal state of Fe1.16Te0.6Se0.4en_AU
dc.typeJournal Articleen_AU
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