Superconductivity and magnetism in Rb 0.8Fe 1.6Se 2 under pressure

Vadim Ksenofontov; Sergey A. Medvedev; Leslie M. Schoop; Gerhard Wortmann; Taras Palasyuk; Vladimir Tsurkan; Joachim Deisenhofer; Alois Loidl; Claudia Felser

doi:10.1103/PhysRevB.85.214519

Superconductivity and magnetism in Rb _0.8Fe _1.6Se ₂ under pressure

Vadim Ksenofontov, Sergey A. Medvedev, Leslie M. Schoop, Gerhard Wortmann, Taras Palasyuk, Vladimir Tsurkan, Joachim Deisenhofer, Alois Loidl, Claudia Felser

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

High-pressure magnetization, structural, and 57Fe Mössbauer studies were performed on superconducting Rb _0.8Fe _1.6Se _2.0 with T _c = 32.4 K. The gradual decrease of T _c with increasing pressure up to 5 GPa is followed by a step-like suppression of superconductivity at higher pressures. No structural phase transition in the Fe vacancy-ordered superstructure is observed in synchrotron x-ray diffraction (XRD) studies up to 15.6 GPa. The Mössbauer spectra above 5 GPa reveal the appearance of a new paramagnetic phase, exhibiting magnetic order below 80 K, coinciding with the irreversible disappearance of superconductivity. We interpret these changes as due to a pressure-induced diffusion of Rb ions between the two phases, responsible for the antiferromagnetism and superconductivity in Rb _0.8Fe _1.6Se _2.0.

Original language	English (US)
Article number	214519
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.85.214519
State	Published - Jun 19 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.85.214519

Cite this

@article{81cce63079f040d18cf489242a733cef,

title = "Superconductivity and magnetism in Rb 0.8Fe 1.6Se 2 under pressure",

abstract = "High-pressure magnetization, structural, and 57Fe M{\"o}ssbauer studies were performed on superconducting Rb 0.8Fe 1.6Se 2.0 with T c = 32.4 K. The gradual decrease of T c with increasing pressure up to 5 GPa is followed by a step-like suppression of superconductivity at higher pressures. No structural phase transition in the Fe vacancy-ordered superstructure is observed in synchrotron x-ray diffraction (XRD) studies up to 15.6 GPa. The M{\"o}ssbauer spectra above 5 GPa reveal the appearance of a new paramagnetic phase, exhibiting magnetic order below 80 K, coinciding with the irreversible disappearance of superconductivity. We interpret these changes as due to a pressure-induced diffusion of Rb ions between the two phases, responsible for the antiferromagnetism and superconductivity in Rb 0.8Fe 1.6Se 2.0.",

author = "Vadim Ksenofontov and Medvedev, {Sergey A.} and Schoop, {Leslie M.} and Gerhard Wortmann and Taras Palasyuk and Vladimir Tsurkan and Joachim Deisenhofer and Alois Loidl and Claudia Felser",

year = "2012",

month = jun,

day = "19",

doi = "10.1103/PhysRevB.85.214519",

language = "English (US)",

volume = "85",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "21",

}

TY - JOUR

T1 - Superconductivity and magnetism in Rb 0.8Fe 1.6Se 2 under pressure

AU - Ksenofontov, Vadim

AU - Medvedev, Sergey A.

AU - Schoop, Leslie M.

AU - Wortmann, Gerhard

AU - Palasyuk, Taras

AU - Tsurkan, Vladimir

AU - Deisenhofer, Joachim

AU - Loidl, Alois

AU - Felser, Claudia

PY - 2012/6/19

Y1 - 2012/6/19

N2 - High-pressure magnetization, structural, and 57Fe Mössbauer studies were performed on superconducting Rb 0.8Fe 1.6Se 2.0 with T c = 32.4 K. The gradual decrease of T c with increasing pressure up to 5 GPa is followed by a step-like suppression of superconductivity at higher pressures. No structural phase transition in the Fe vacancy-ordered superstructure is observed in synchrotron x-ray diffraction (XRD) studies up to 15.6 GPa. The Mössbauer spectra above 5 GPa reveal the appearance of a new paramagnetic phase, exhibiting magnetic order below 80 K, coinciding with the irreversible disappearance of superconductivity. We interpret these changes as due to a pressure-induced diffusion of Rb ions between the two phases, responsible for the antiferromagnetism and superconductivity in Rb 0.8Fe 1.6Se 2.0.

AB - High-pressure magnetization, structural, and 57Fe Mössbauer studies were performed on superconducting Rb 0.8Fe 1.6Se 2.0 with T c = 32.4 K. The gradual decrease of T c with increasing pressure up to 5 GPa is followed by a step-like suppression of superconductivity at higher pressures. No structural phase transition in the Fe vacancy-ordered superstructure is observed in synchrotron x-ray diffraction (XRD) studies up to 15.6 GPa. The Mössbauer spectra above 5 GPa reveal the appearance of a new paramagnetic phase, exhibiting magnetic order below 80 K, coinciding with the irreversible disappearance of superconductivity. We interpret these changes as due to a pressure-induced diffusion of Rb ions between the two phases, responsible for the antiferromagnetism and superconductivity in Rb 0.8Fe 1.6Se 2.0.

UR - http://www.scopus.com/inward/record.url?scp=84862648759&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862648759&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.214519

DO - 10.1103/PhysRevB.85.214519

M3 - Article

AN - SCOPUS:84862648759

SN - 1098-0121

VL - 85

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 21

M1 - 214519

ER -

Superconductivity and magnetism in Rb _0.8Fe _1.6Se ₂ under pressure

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this