Glassy vortex behavior in superconducting SrPd 2Ge 2 single crystals

N. H. Sung; Y. J. Jo; B. K. Cho

doi:10.1088/0953-2048/25/7/075002

Glassy vortex behavior in superconducting SrPd ₂Ge ₂ single crystals

N. H. Sung
, Y. J. Jo
, B. K. Cho

Gwangju Institute of Science and Technology

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

3 Scopus citations

Abstract

In this study we report the vortex-glass behavior of superconducting ternary germanide SrPd ₂Ge ₂ single crystals with a ThCr ₂Si ₂-type structure. We observed flux trapping and its nonexponential decay with time after the magnetic field was turned off at T=2K. In addition, we found that the diamagnetism in the zero field cooling (ZFC) mode below T _c was irreversible, depending on the temperature and field history, whereas the diamagnetism in the field-cooled warming (FCW) mode was reversible if the applied magnetic field was parallel to the c-axis. An irreversibility line T _r(H) was determined by the ZFC and FCW measurements at various magnetic fields, and the temperature dependence of T _r(H) was found to agree with the de AlmeidaThouless relation, H=H ₀[1T _r(H)/T _c(0)] ^γ, where γ=3/2. Including these vortex-glass behaviors, we discuss the critical current density, J _c(T), determined from isothermal magnetization measurements at various temperatures, and the pinning potential, determined from the slope of an Arrhenius plot, lnR(T,B) versus 1/T.

Original language	English
Article number	075002
Journal	Superconductor Science and Technology
Volume	25
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/25/7/075002
State	Published - Jul 2012

Access to Document

10.1088/0953-2048/25/7/075002

Cite this

@article{a8aad36a831f4a65b5a8fd8d756f5574,

title = "Glassy vortex behavior in superconducting SrPd 2Ge 2 single crystals",

abstract = "In this study we report the vortex-glass behavior of superconducting ternary germanide SrPd 2Ge 2 single crystals with a ThCr 2Si 2-type structure. We observed flux trapping and its nonexponential decay with time after the magnetic field was turned off at T=2K. In addition, we found that the diamagnetism in the zero field cooling (ZFC) mode below T c was irreversible, depending on the temperature and field history, whereas the diamagnetism in the field-cooled warming (FCW) mode was reversible if the applied magnetic field was parallel to the c-axis. An irreversibility line T r(H) was determined by the ZFC and FCW measurements at various magnetic fields, and the temperature dependence of T r(H) was found to agree with the de AlmeidaThouless relation, H=H 0[1T r(H)/T c(0)] γ, where γ=3/2. Including these vortex-glass behaviors, we discuss the critical current density, J c(T), determined from isothermal magnetization measurements at various temperatures, and the pinning potential, determined from the slope of an Arrhenius plot, lnR(T,B) versus 1/T.",

author = "Sung, \{N. H.\} and Jo, \{Y. J.\} and Cho, \{B. K.\}",

year = "2012",

month = jul,

doi = "10.1088/0953-2048/25/7/075002",

language = "English",

volume = "25",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "Institute of Physics",

number = "7",

}

TY - JOUR

T1 - Glassy vortex behavior in superconducting SrPd 2Ge 2 single crystals

AU - Sung, N. H.

AU - Jo, Y. J.

AU - Cho, B. K.

PY - 2012/7

Y1 - 2012/7

N2 - In this study we report the vortex-glass behavior of superconducting ternary germanide SrPd 2Ge 2 single crystals with a ThCr 2Si 2-type structure. We observed flux trapping and its nonexponential decay with time after the magnetic field was turned off at T=2K. In addition, we found that the diamagnetism in the zero field cooling (ZFC) mode below T c was irreversible, depending on the temperature and field history, whereas the diamagnetism in the field-cooled warming (FCW) mode was reversible if the applied magnetic field was parallel to the c-axis. An irreversibility line T r(H) was determined by the ZFC and FCW measurements at various magnetic fields, and the temperature dependence of T r(H) was found to agree with the de AlmeidaThouless relation, H=H 0[1T r(H)/T c(0)] γ, where γ=3/2. Including these vortex-glass behaviors, we discuss the critical current density, J c(T), determined from isothermal magnetization measurements at various temperatures, and the pinning potential, determined from the slope of an Arrhenius plot, lnR(T,B) versus 1/T.

AB - In this study we report the vortex-glass behavior of superconducting ternary germanide SrPd 2Ge 2 single crystals with a ThCr 2Si 2-type structure. We observed flux trapping and its nonexponential decay with time after the magnetic field was turned off at T=2K. In addition, we found that the diamagnetism in the zero field cooling (ZFC) mode below T c was irreversible, depending on the temperature and field history, whereas the diamagnetism in the field-cooled warming (FCW) mode was reversible if the applied magnetic field was parallel to the c-axis. An irreversibility line T r(H) was determined by the ZFC and FCW measurements at various magnetic fields, and the temperature dependence of T r(H) was found to agree with the de AlmeidaThouless relation, H=H 0[1T r(H)/T c(0)] γ, where γ=3/2. Including these vortex-glass behaviors, we discuss the critical current density, J c(T), determined from isothermal magnetization measurements at various temperatures, and the pinning potential, determined from the slope of an Arrhenius plot, lnR(T,B) versus 1/T.

UR - https://www.scopus.com/pages/publications/84861635178

U2 - 10.1088/0953-2048/25/7/075002

DO - 10.1088/0953-2048/25/7/075002

M3 - Article

AN - SCOPUS:84861635178

SN - 0953-2048

VL - 25

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 7

M1 - 075002

ER -

Glassy vortex behavior in superconducting SrPd ₂Ge ₂ single crystals

Abstract

Access to Document

Other files and links

Fingerprint

Cite this