Correlation between electron-phonon coupling and superconductivity of Sn2+ ion irradiated MgB2-thin films

Ha H. Pham; Tien Le; The Nghia Nguyen; Nguyen Hoang Nam; Nhung T. Nguyen; Min Kyun Sohn; Dae Joon Kang; Tuson Park; Jinyoung Yun; Yeonkyu Lee; Jeehoon Kim; Duc H. Tran; Won Nam Kang

doi:10.1016/j.ceramint.2023.03.188

Correlation between electron-phonon coupling and superconductivity of Sn²⁺ ion irradiated MgB₂-thin films

Ha H. Pham
, Tien Le
, The Nghia Nguyen
, Nguyen Hoang Nam
, Nhung T. Nguyen
, Min Kyun Sohn
, Dae Joon Kang
, Tuson Park
, Jinyoung Yun
, Yeonkyu Lee
, Jeehoon Kim
, Duc H. Tran
, Won Nam Kang

Department of Physics

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

5 Scopus citations

Abstract

This study investigates the impact of 2 MeV Tin ion (Sn²⁺) irradiation with doses from 2E12 to 7E13 on the Raman spectroscopy and superconductivity properties of MgB₂-thin films samples. Raman spectroscopy has been used to examine the behavior of electron-phonon coupling (EPC). For the superconductivity properties, the temperature dependence resistivity, R(T), and the magnetic field-dependent magnetization, M(H), were measured. The import of EPC, which is related to the change in critical temperature (T_c), was calculated using the McMillan-formula modified by Allen–Dynes, using the phonon frequency of the middle peak center ω₂(E_2g). Raman spectroscopy showed that the value of EPC decreased from 1.113 (Pristine) to 0.969 (7E13). Although the critical temperature (T_c) decreased with increasing Sn²⁺ ion doses, the values of the in-field critical current density (J_c) and upper critical field (H_c2) increased and reached a maximum for the 5E13 sample. In addition, the magnetic penetration depths of the pristine and optimal dose (5E13) samples were measured using magnetic force microscopy (MFM), providing the thermodynamic critical field (H_c) in the MgB₂ films.

Original language	English
Pages (from-to)	20586-20593
Number of pages	8
Journal	Ceramics International
Volume	49
Issue number	12
DOIs	https://doi.org/10.1016/j.ceramint.2023.03.188
State	Published - 15 Jun 2023

Keywords

Critical current density
Electron-phonon coupling
Magnetic force microscopy
MgB
Upper critical field

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10.1016/j.ceramint.2023.03.188

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@article{4850164f0c2e4f50bcb258d77e03999b,

title = "Correlation between electron-phonon coupling and superconductivity of Sn2+ ion irradiated MgB2-thin films",

abstract = "This study investigates the impact of 2 MeV Tin ion (Sn2+) irradiation with doses from 2E12 to 7E13 on the Raman spectroscopy and superconductivity properties of MgB2-thin films samples. Raman spectroscopy has been used to examine the behavior of electron-phonon coupling (EPC). For the superconductivity properties, the temperature dependence resistivity, R(T), and the magnetic field-dependent magnetization, M(H), were measured. The import of EPC, which is related to the change in critical temperature (Tc), was calculated using the McMillan-formula modified by Allen–Dynes, using the phonon frequency of the middle peak center ω2(E2g). Raman spectroscopy showed that the value of EPC decreased from 1.113 (Pristine) to 0.969 (7E13). Although the critical temperature (Tc) decreased with increasing Sn2+ ion doses, the values of the in-field critical current density (Jc) and upper critical field (Hc2) increased and reached a maximum for the 5E13 sample. In addition, the magnetic penetration depths of the pristine and optimal dose (5E13) samples were measured using magnetic force microscopy (MFM), providing the thermodynamic critical field (Hc) in the MgB2 films.",

keywords = "Critical current density, Electron-phonon coupling, Magnetic force microscopy, MgB, Upper critical field",

author = "Pham, \{Ha H.\} and Tien Le and Nguyen, \{The Nghia\} and Nam, \{Nguyen Hoang\} and Nguyen, \{Nhung T.\} and Sohn, \{Min Kyun\} and Kang, \{Dae Joon\} and Tuson Park and Jinyoung Yun and Yeonkyu Lee and Jeehoon Kim and Tran, \{Duc H.\} and Kang, \{Won Nam\}",

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year = "2023",

month = jun,

day = "15",

doi = "10.1016/j.ceramint.2023.03.188",

language = "English",

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pages = "20586--20593",

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TY - JOUR

T1 - Correlation between electron-phonon coupling and superconductivity of Sn2+ ion irradiated MgB2-thin films

AU - Pham, Ha H.

AU - Le, Tien

AU - Nguyen, The Nghia

AU - Nam, Nguyen Hoang

AU - Nguyen, Nhung T.

AU - Sohn, Min Kyun

AU - Kang, Dae Joon

AU - Park, Tuson

AU - Yun, Jinyoung

AU - Lee, Yeonkyu

AU - Kim, Jeehoon

AU - Tran, Duc H.

AU - Kang, Won Nam

PY - 2023/6/15

Y1 - 2023/6/15

N2 - This study investigates the impact of 2 MeV Tin ion (Sn2+) irradiation with doses from 2E12 to 7E13 on the Raman spectroscopy and superconductivity properties of MgB2-thin films samples. Raman spectroscopy has been used to examine the behavior of electron-phonon coupling (EPC). For the superconductivity properties, the temperature dependence resistivity, R(T), and the magnetic field-dependent magnetization, M(H), were measured. The import of EPC, which is related to the change in critical temperature (Tc), was calculated using the McMillan-formula modified by Allen–Dynes, using the phonon frequency of the middle peak center ω2(E2g). Raman spectroscopy showed that the value of EPC decreased from 1.113 (Pristine) to 0.969 (7E13). Although the critical temperature (Tc) decreased with increasing Sn2+ ion doses, the values of the in-field critical current density (Jc) and upper critical field (Hc2) increased and reached a maximum for the 5E13 sample. In addition, the magnetic penetration depths of the pristine and optimal dose (5E13) samples were measured using magnetic force microscopy (MFM), providing the thermodynamic critical field (Hc) in the MgB2 films.

AB - This study investigates the impact of 2 MeV Tin ion (Sn2+) irradiation with doses from 2E12 to 7E13 on the Raman spectroscopy and superconductivity properties of MgB2-thin films samples. Raman spectroscopy has been used to examine the behavior of electron-phonon coupling (EPC). For the superconductivity properties, the temperature dependence resistivity, R(T), and the magnetic field-dependent magnetization, M(H), were measured. The import of EPC, which is related to the change in critical temperature (Tc), was calculated using the McMillan-formula modified by Allen–Dynes, using the phonon frequency of the middle peak center ω2(E2g). Raman spectroscopy showed that the value of EPC decreased from 1.113 (Pristine) to 0.969 (7E13). Although the critical temperature (Tc) decreased with increasing Sn2+ ion doses, the values of the in-field critical current density (Jc) and upper critical field (Hc2) increased and reached a maximum for the 5E13 sample. In addition, the magnetic penetration depths of the pristine and optimal dose (5E13) samples were measured using magnetic force microscopy (MFM), providing the thermodynamic critical field (Hc) in the MgB2 films.

KW - Critical current density

KW - Electron-phonon coupling

KW - Magnetic force microscopy

KW - MgB

KW - Upper critical field

UR - https://www.scopus.com/pages/publications/85151241741

U2 - 10.1016/j.ceramint.2023.03.188

DO - 10.1016/j.ceramint.2023.03.188

M3 - Article

AN - SCOPUS:85151241741

SN - 0272-8842

VL - 49

SP - 20586

EP - 20593

JO - Ceramics International

JF - Ceramics International

IS - 12

ER -

Correlation between electron-phonon coupling and superconductivity of Sn²⁺ ion irradiated MgB₂-thin films

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Keywords

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