Structural, electro-magnetic, and optical properties of Ba(Fe,Ni)2As2 single-crystal thin film

Sejun Yoon; Yu Seong Seo; Seokbae Lee; Jeremy D. Weiss; Jianyi Jiang; Myeongjun Oh; Jongmin Lee; Sehun Seo; Youn Jung Jo; Eric E. Hellstrom; Jungseek Hwang; Sanghan Lee

doi:10.1088/1361-6668/30/3/035001

Structural, electro-magnetic, and optical properties of Ba(Fe,Ni)₂As₂ single-crystal thin film

Sejun Yoon, Yu Seong Seo, Seokbae Lee, Jeremy D. Weiss, Jianyi Jiang, Myeongjun Oh, Jongmin Lee, Sehun Seo, Youn Jung Jo, Eric E. Hellstrom, Jungseek Hwang, Sanghan Lee

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

18 Scopus citations

Abstract

We investigated the superconducting transition temperature (T _c), critical current density (J _c) and optical properties of optimally doped Ba(Fe_0.95Ni_0.05)₂As₂ (Ni-Ba122) single-crystalline epitaxial thin films grown by pulsed laser deposition for the first time. The T _c at zero resistivity was about 20.5 K and the J _c at self-field and 4.2 K was 2.8 MA cm^-2 calculated by the Bean model. The superconducting properties such as T _c and J _c of thin films are comparable to those of bulk single-crystal samples. The superfluid plasma frequency (λ _p,S) of Ni-Ba122 thin film is ∼7033 cm^-1 obtained by optical spectroscopic technique. Based on this plasma frequency, we obtained the London penetration depth (λ _L), ∼226 nm at 8 K, which is comparable to those of optimally Co- and K-doped BaFe₂As₂ single crystals.

Original language	English
Article number	035001
Journal	Superconductor Science and Technology
Volume	30
Issue number	3
DOIs	https://doi.org/10.1088/1361-6668/30/3/035001
State	Published - Mar 2017

Keywords

Ba(Fe, Ni)2As2
epitaxial thin films
optical spectroscopy
pnictides

Access to Document

10.1088/1361-6668/30/3/035001

Cite this

@article{0f42147e18274acc828d92157e131f25,

title = "Structural, electro-magnetic, and optical properties of Ba(Fe,Ni)2As2 single-crystal thin film",

abstract = "We investigated the superconducting transition temperature (T c), critical current density (J c) and optical properties of optimally doped Ba(Fe0.95Ni0.05)2As2 (Ni-Ba122) single-crystalline epitaxial thin films grown by pulsed laser deposition for the first time. The T c at zero resistivity was about 20.5 K and the J c at self-field and 4.2 K was 2.8 MA cm-2 calculated by the Bean model. The superconducting properties such as T c and J c of thin films are comparable to those of bulk single-crystal samples. The superfluid plasma frequency (λ p,S) of Ni-Ba122 thin film is ∼7033 cm-1 obtained by optical spectroscopic technique. Based on this plasma frequency, we obtained the London penetration depth (λ L), ∼226 nm at 8 K, which is comparable to those of optimally Co- and K-doped BaFe2As2 single crystals.",

keywords = "Ba(Fe, Ni)2As2, epitaxial thin films, optical spectroscopy, pnictides",

author = "Sejun Yoon and Seo, {Yu Seong} and Seokbae Lee and Weiss, {Jeremy D.} and Jianyi Jiang and Myeongjun Oh and Jongmin Lee and Sehun Seo and Jo, {Youn Jung} and Hellstrom, {Eric E.} and Jungseek Hwang and Sanghan Lee",

note = "Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd.",

year = "2017",

month = mar,

doi = "10.1088/1361-6668/30/3/035001",

language = "English",

volume = "30",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "IOP Publishing Ltd.",

number = "3",

}

TY - JOUR

T1 - Structural, electro-magnetic, and optical properties of Ba(Fe,Ni)2As2 single-crystal thin film

AU - Yoon, Sejun

AU - Seo, Yu Seong

AU - Lee, Seokbae

AU - Weiss, Jeremy D.

AU - Jiang, Jianyi

AU - Oh, Myeongjun

AU - Lee, Jongmin

AU - Seo, Sehun

AU - Jo, Youn Jung

AU - Hellstrom, Eric E.

AU - Hwang, Jungseek

AU - Lee, Sanghan

PY - 2017/3

Y1 - 2017/3

N2 - We investigated the superconducting transition temperature (T c), critical current density (J c) and optical properties of optimally doped Ba(Fe0.95Ni0.05)2As2 (Ni-Ba122) single-crystalline epitaxial thin films grown by pulsed laser deposition for the first time. The T c at zero resistivity was about 20.5 K and the J c at self-field and 4.2 K was 2.8 MA cm-2 calculated by the Bean model. The superconducting properties such as T c and J c of thin films are comparable to those of bulk single-crystal samples. The superfluid plasma frequency (λ p,S) of Ni-Ba122 thin film is ∼7033 cm-1 obtained by optical spectroscopic technique. Based on this plasma frequency, we obtained the London penetration depth (λ L), ∼226 nm at 8 K, which is comparable to those of optimally Co- and K-doped BaFe2As2 single crystals.

AB - We investigated the superconducting transition temperature (T c), critical current density (J c) and optical properties of optimally doped Ba(Fe0.95Ni0.05)2As2 (Ni-Ba122) single-crystalline epitaxial thin films grown by pulsed laser deposition for the first time. The T c at zero resistivity was about 20.5 K and the J c at self-field and 4.2 K was 2.8 MA cm-2 calculated by the Bean model. The superconducting properties such as T c and J c of thin films are comparable to those of bulk single-crystal samples. The superfluid plasma frequency (λ p,S) of Ni-Ba122 thin film is ∼7033 cm-1 obtained by optical spectroscopic technique. Based on this plasma frequency, we obtained the London penetration depth (λ L), ∼226 nm at 8 K, which is comparable to those of optimally Co- and K-doped BaFe2As2 single crystals.

KW - Ba(Fe, Ni)2As2

KW - epitaxial thin films

KW - optical spectroscopy

KW - pnictides

UR - http://www.scopus.com/inward/record.url?scp=85014526310&partnerID=8YFLogxK

U2 - 10.1088/1361-6668/30/3/035001

DO - 10.1088/1361-6668/30/3/035001

M3 - Article

AN - SCOPUS:85014526310

SN - 0953-2048

VL - 30

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 3

M1 - 035001

ER -

Structural, electro-magnetic, and optical properties of Ba(Fe,Ni)₂As₂ single-crystal thin film

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this