Nonlocality effects of MgB2 superconductor

Jeong Hun Yang; Jong Su You; Soo Kyung Lee; Kyu Jeong Song

doi:10.9714/psac.2023.25.3.022

Nonlocality effects of MgB2 superconductor

Jeong Hun Yang
, Jong Su You
, Soo Kyung Lee
, Kyu Jeong Song^*

^*Corresponding author for this work

Physics Education

Jeonbuk National University

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

Abstract

Magnetic properties of MgB₂ superconducting powder were investigated. M(H), the magnetic field H dependence of magnetization M, was measured and analyzed using a PPMS instrument. The MgB₂ superconducting powder showed high critical current density J_c > ∼ 10⁷ A/cm² and clean limit superconducting properties. The equilibrium magnetization M_eq properties of MgB₂ powders exhibiting various superconducting properties were studied. We find that the equilibrium magnetization M_eq(H) properties of MgB₂ powders showing conventional BCS properties deviate from the predictions of the standard local-London theory at temperatures below T = 19 K and are in good agreement with the generalized nonlocal-London theory. Nonlocal-London analysis was used to determine and analyze the nonlocal parameters. The temperature dependence of the London penetration depth values λ(T) was studied.

Original language	English
Pages (from-to)	22-27
Number of pages	6
Journal	Progress in Superconductivity and Cryogenics (PSAC)
Volume	25
Issue number	3
DOIs	https://doi.org/10.9714/psac.2023.25.3.022
State	Published - 2023

Keywords

equilibrium magnetization
local-london theory
london penetration depth
MgB2 powder
nonlocal-london theory

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Electrical & Electronic
Engineering - Petroleum

Access to Document

10.9714/psac.2023.25.3.022

Cite this

@article{cea917302f384e6596b267c86ec0fda0,

title = "Nonlocality effects of MgB2 superconductor",

abstract = "Magnetic properties of MgB2 superconducting powder were investigated. M(H), the magnetic field H dependence of magnetization M, was measured and analyzed using a PPMS instrument. The MgB2 superconducting powder showed high critical current density Jc > ∼ 107 A/cm2 and clean limit superconducting properties. The equilibrium magnetization Meq properties of MgB2 powders exhibiting various superconducting properties were studied. We find that the equilibrium magnetization Meq(H) properties of MgB2 powders showing conventional BCS properties deviate from the predictions of the standard local-London theory at temperatures below T = 19 K and are in good agreement with the generalized nonlocal-London theory. Nonlocal-London analysis was used to determine and analyze the nonlocal parameters. The temperature dependence of the London penetration depth values λ(T) was studied.",

keywords = "equilibrium magnetization, local-london theory, london penetration depth, MgB2 powder, nonlocal-london theory",

author = "Yang, \{Jeong Hun\} and You, \{Jong Su\} and Lee, \{Soo Kyung\} and Song, \{Kyu Jeong\}",

year = "2023",

doi = "10.9714/psac.2023.25.3.022",

language = "English",

volume = "25",

pages = "22--27",

journal = "Progress in Superconductivity and Cryogenics (PSAC)",

issn = "1229-3008",

number = "3",

}

TY - JOUR

T1 - Nonlocality effects of MgB2 superconductor

AU - Yang, Jeong Hun

AU - You, Jong Su

AU - Lee, Soo Kyung

AU - Song, Kyu Jeong

PY - 2023

Y1 - 2023

N2 - Magnetic properties of MgB2 superconducting powder were investigated. M(H), the magnetic field H dependence of magnetization M, was measured and analyzed using a PPMS instrument. The MgB2 superconducting powder showed high critical current density Jc > ∼ 107 A/cm2 and clean limit superconducting properties. The equilibrium magnetization Meq properties of MgB2 powders exhibiting various superconducting properties were studied. We find that the equilibrium magnetization Meq(H) properties of MgB2 powders showing conventional BCS properties deviate from the predictions of the standard local-London theory at temperatures below T = 19 K and are in good agreement with the generalized nonlocal-London theory. Nonlocal-London analysis was used to determine and analyze the nonlocal parameters. The temperature dependence of the London penetration depth values λ(T) was studied.

AB - Magnetic properties of MgB2 superconducting powder were investigated. M(H), the magnetic field H dependence of magnetization M, was measured and analyzed using a PPMS instrument. The MgB2 superconducting powder showed high critical current density Jc > ∼ 107 A/cm2 and clean limit superconducting properties. The equilibrium magnetization Meq properties of MgB2 powders exhibiting various superconducting properties were studied. We find that the equilibrium magnetization Meq(H) properties of MgB2 powders showing conventional BCS properties deviate from the predictions of the standard local-London theory at temperatures below T = 19 K and are in good agreement with the generalized nonlocal-London theory. Nonlocal-London analysis was used to determine and analyze the nonlocal parameters. The temperature dependence of the London penetration depth values λ(T) was studied.

KW - equilibrium magnetization

KW - local-london theory

KW - london penetration depth

KW - MgB2 powder

KW - nonlocal-london theory

UR - https://www.scopus.com/pages/publications/85175249923

U2 - 10.9714/psac.2023.25.3.022

DO - 10.9714/psac.2023.25.3.022

M3 - Journal article

AN - SCOPUS:85175249923

SN - 1229-3008

VL - 25

SP - 22

EP - 27

JO - Progress in Superconductivity and Cryogenics (PSAC)

JF - Progress in Superconductivity and Cryogenics (PSAC)

IS - 3

ER -

Nonlocality effects of MgB2 superconductor

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

Other files and links

Fingerprint

Cite this