Inverse iron isotope effect in FeSe0.35Te0.65

Y. Tsuge; A. Iyo; Y. Tanaka; H. Eisaki; T. Nishio

doi:10.1016/j.phpro.2012.06.276

Inverse iron isotope effect in FeSe_0.35Te_0.65

Y. Tsuge, A. Iyo, Y. Tanaka, H. Eisaki, T. Nishio

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

We study an iron isotope effect of FeSe_1-xTe_x (x=0.65) polycrystalline samples with three types of iron isotopes (⁵⁴Fe, natural Fe, and ⁵⁷Fe) which were synthesized carefully in order to rule out differences in the Te content x between them. Our estimate of an isotope coefficient α_Fe defined by -dlnT_c/dlnM, where T_c and M are the superconducting transition temperature and the iron isotope mass, is -0.54(1). Measurements of powder x-ray diffraction (XRD) show no significant difference in lattice parameters between the samples. These indicate that compositionally wellcontrolled FeSe_1-xTe_x may possess inverse iron isotope coefficients.

Original language	English
Pages (from-to)	731-734
Number of pages	4
Journal	Physics Procedia
Volume	36
DOIs	https://doi.org/10.1016/j.phpro.2012.06.276
Publication status	Published - 2012
Event	Superconductivity Centennial Conference, SCC 2011 - The Hague, Netherlands Duration: 18 Sep 2011 → 23 Sep 2011

Keywords

Fe-based superconductor
Isotpe effect
Nonconventional mechanism
Phonon mechanism
Pnictides

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10.1016/j.phpro.2012.06.276

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title = "Inverse iron isotope effect in FeSe0.35Te0.65",

abstract = "We study an iron isotope effect of FeSe1-xTex (x=0.65) polycrystalline samples with three types of iron isotopes (54Fe, natural Fe, and 57Fe) which were synthesized carefully in order to rule out differences in the Te content x between them. Our estimate of an isotope coefficient αFe defined by -dlnTc/dlnM, where Tc and M are the superconducting transition temperature and the iron isotope mass, is -0.54(1). Measurements of powder x-ray diffraction (XRD) show no significant difference in lattice parameters between the samples. These indicate that compositionally wellcontrolled FeSe1-xTex may possess inverse iron isotope coefficients.",

keywords = "Fe-based superconductor, Isotpe effect, Nonconventional mechanism, Phonon mechanism, Pnictides",

author = "Y. Tsuge and A. Iyo and Y. Tanaka and H. Eisaki and T. Nishio",

note = "Publisher Copyright: {\textcopyright} 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.; Superconductivity Centennial Conference, SCC 2011 ; Conference date: 18-09-2011 Through 23-09-2011",

year = "2012",

doi = "10.1016/j.phpro.2012.06.276",

language = "English",

volume = "36",

pages = "731--734",

journal = "Physics Procedia",

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TY - JOUR

T1 - Inverse iron isotope effect in FeSe0.35Te0.65

AU - Tsuge, Y.

AU - Iyo, A.

AU - Tanaka, Y.

AU - Eisaki, H.

AU - Nishio, T.

PY - 2012

Y1 - 2012

N2 - We study an iron isotope effect of FeSe1-xTex (x=0.65) polycrystalline samples with three types of iron isotopes (54Fe, natural Fe, and 57Fe) which were synthesized carefully in order to rule out differences in the Te content x between them. Our estimate of an isotope coefficient αFe defined by -dlnTc/dlnM, where Tc and M are the superconducting transition temperature and the iron isotope mass, is -0.54(1). Measurements of powder x-ray diffraction (XRD) show no significant difference in lattice parameters between the samples. These indicate that compositionally wellcontrolled FeSe1-xTex may possess inverse iron isotope coefficients.

AB - We study an iron isotope effect of FeSe1-xTex (x=0.65) polycrystalline samples with three types of iron isotopes (54Fe, natural Fe, and 57Fe) which were synthesized carefully in order to rule out differences in the Te content x between them. Our estimate of an isotope coefficient αFe defined by -dlnTc/dlnM, where Tc and M are the superconducting transition temperature and the iron isotope mass, is -0.54(1). Measurements of powder x-ray diffraction (XRD) show no significant difference in lattice parameters between the samples. These indicate that compositionally wellcontrolled FeSe1-xTex may possess inverse iron isotope coefficients.

KW - Fe-based superconductor

KW - Isotpe effect

KW - Nonconventional mechanism

KW - Phonon mechanism

KW - Pnictides

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U2 - 10.1016/j.phpro.2012.06.276

DO - 10.1016/j.phpro.2012.06.276

M3 - Conference article

AN - SCOPUS:84902290216

VL - 36

SP - 731

EP - 734

JO - Physics Procedia

JF - Physics Procedia

SN - 1875-3884

T2 - Superconductivity Centennial Conference, SCC 2011

Y2 - 18 September 2011 through 23 September 2011

ER -

Inverse iron isotope effect in FeSe_0.35Te_0.65

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Keywords

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