Homogeneous coexistence and phase segregation in 1111 iron-based pnictides studied via NMR

Naoki Fujiwara; Yoichi Kamihara; Satoru Matsuishi; Hideo Hosono

doi:10.3938/jkps.62.2004

Homogeneous coexistence and phase segregation in 1111 iron-based pnictides studied via NMR

Naoki Fujiwara, Yoichi Kamihara, Satoru Matsuishi, Hideo Hosono

Department of Applied Physics and Physico-Informatics

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

Abstract

We performed ⁷⁵As and ⁵¹Co nuclear magnetic resonance (NMR) measurements on LaFeAsO_1-xF_x (La1111), a prototype of iron-based superconductors, and on Ca(Fe_1-xCo_x)AsF (Ca1111), which has a small overlap between the antiferromagnetic (AF) and superconducting (SC) domes in the electronic phase diagram. We found in the Ca1111 series that AF and SC states coexist homogeneously in the overlapped region, while in the La1111 series, we found that paramagnetic (PM) and SC domains coexist around the AF-SC phase boundary. The coexistence of these domains indicates that the AF and SC domes segregate from each other in the electronic phase diagram.

Original language	English
Pages (from-to)	2004-2006
Number of pages	3
Journal	Journal of the Korean Physical Society
Volume	62
Issue number	12
DOIs	https://doi.org/10.3938/jkps.62.2004
Publication status	Published - 2013 Jul

Keywords

1111 series
Iron-based superconductors
NMR

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.3938/jkps.62.2004

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@article{127ace023ce74bc4bb950617f1efd7ff,

title = "Homogeneous coexistence and phase segregation in 1111 iron-based pnictides studied via NMR",

abstract = "We performed 75As and 51Co nuclear magnetic resonance (NMR) measurements on LaFeAsO1-xFx (La1111), a prototype of iron-based superconductors, and on Ca(Fe1-xCox)AsF (Ca1111), which has a small overlap between the antiferromagnetic (AF) and superconducting (SC) domes in the electronic phase diagram. We found in the Ca1111 series that AF and SC states coexist homogeneously in the overlapped region, while in the La1111 series, we found that paramagnetic (PM) and SC domains coexist around the AF-SC phase boundary. The coexistence of these domains indicates that the AF and SC domes segregate from each other in the electronic phase diagram.",

keywords = "1111 series, Iron-based superconductors, NMR",

author = "Naoki Fujiwara and Yoichi Kamihara and Satoru Matsuishi and Hideo Hosono",

note = "Funding Information: The NMR work is supported by a Grant-in-Aid (Grant No. KAKENHI 23340101) from the Ministry of Education, Science, and Culture, Japan. This work is supported in part by the (JPSJ) First program. We would like to thank T. Nakano and S. Tutsumi for experimental support.",

year = "2013",

month = jul,

doi = "10.3938/jkps.62.2004",

language = "English",

volume = "62",

pages = "2004--2006",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

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TY - JOUR

T1 - Homogeneous coexistence and phase segregation in 1111 iron-based pnictides studied via NMR

AU - Fujiwara, Naoki

AU - Kamihara, Yoichi

AU - Matsuishi, Satoru

AU - Hosono, Hideo

N1 - Funding Information: The NMR work is supported by a Grant-in-Aid (Grant No. KAKENHI 23340101) from the Ministry of Education, Science, and Culture, Japan. This work is supported in part by the (JPSJ) First program. We would like to thank T. Nakano and S. Tutsumi for experimental support.

PY - 2013/7

Y1 - 2013/7

N2 - We performed 75As and 51Co nuclear magnetic resonance (NMR) measurements on LaFeAsO1-xFx (La1111), a prototype of iron-based superconductors, and on Ca(Fe1-xCox)AsF (Ca1111), which has a small overlap between the antiferromagnetic (AF) and superconducting (SC) domes in the electronic phase diagram. We found in the Ca1111 series that AF and SC states coexist homogeneously in the overlapped region, while in the La1111 series, we found that paramagnetic (PM) and SC domains coexist around the AF-SC phase boundary. The coexistence of these domains indicates that the AF and SC domes segregate from each other in the electronic phase diagram.

AB - We performed 75As and 51Co nuclear magnetic resonance (NMR) measurements on LaFeAsO1-xFx (La1111), a prototype of iron-based superconductors, and on Ca(Fe1-xCox)AsF (Ca1111), which has a small overlap between the antiferromagnetic (AF) and superconducting (SC) domes in the electronic phase diagram. We found in the Ca1111 series that AF and SC states coexist homogeneously in the overlapped region, while in the La1111 series, we found that paramagnetic (PM) and SC domains coexist around the AF-SC phase boundary. The coexistence of these domains indicates that the AF and SC domes segregate from each other in the electronic phase diagram.

KW - 1111 series

KW - Iron-based superconductors

KW - NMR

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U2 - 10.3938/jkps.62.2004

DO - 10.3938/jkps.62.2004

M3 - Article

AN - SCOPUS:84880016832

SN - 0374-4884

VL - 62

SP - 2004

EP - 2006

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 12

ER -

Homogeneous coexistence and phase segregation in 1111 iron-based pnictides studied via NMR

Abstract

Keywords

ASJC Scopus subject areas

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