Different roles of anisotropy and disorder on the vortex matter of Bi2Sr2CaCu2O8+δ single crystal

D. Darminto; M. Diantoro; I. M. Sutjahja; A. A. Nugroho; W. Loeksmanto; M. O. Tjia

doi:10.1016/S0921-4534(02)01475-2

Different roles of anisotropy and disorder on the vortex matter of Bi₂Sr₂CaCu₂O_8+δ single crystal

D. Darminto, M. Diantoro, I. M. Sutjahja, A. A. Nugroho, W. Loeksmanto, M. O. Tjia^*

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

The oxygen doped and Pb-substituted single crystalline Bi₂Sr₂CaCu₂O_8+δ samples having T_c,on and anisotropy (γ²) ranging respectively from 65 to 93 K and from 773 to 49,715 have been studied in the basis of magneto-resistance and magnetization data. It is found that the lowering of anisotropy due to higher oxygen content or Pb substitution is responsible for the reduction of magnetic field-induced transitional broadening and a shift of H_irr(T) and H_g(T) to higher temperatures and magnetic field. Meanwhile, the increasing disorder manifested by decreasing T_c also leads to the extended range of appearance for the second magnetization peak (SMP) and enlarged critical glassy region. It is shown that decreasing anisotropy does not necessarily lead to the lowering of T_c in contrast to the monotonic dependence of T_c on the disorder measured in the temperature range of SMP effect. Additionally, a remarkable monotonic correlation between T_c and the glassy exponent s has been established.

Original language	English
Pages (from-to)	479-482
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01475-2
Publication status	Published - 1 Oct 2002

Keywords

Anisotropy and disorder
Bi-2212
Oxygen doping and Pb substitution
Vortex state

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10.1016/S0921-4534(02)01475-2

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title = "Different roles of anisotropy and disorder on the vortex matter of Bi2Sr2CaCu2O8+δ single crystal",

abstract = "The oxygen doped and Pb-substituted single crystalline Bi2Sr2CaCu2O8+δ samples having Tc,on and anisotropy (γ2) ranging respectively from 65 to 93 K and from 773 to 49,715 have been studied in the basis of magneto-resistance and magnetization data. It is found that the lowering of anisotropy due to higher oxygen content or Pb substitution is responsible for the reduction of magnetic field-induced transitional broadening and a shift of Hirr(T) and Hg(T) to higher temperatures and magnetic field. Meanwhile, the increasing disorder manifested by decreasing Tc also leads to the extended range of appearance for the second magnetization peak (SMP) and enlarged critical glassy region. It is shown that decreasing anisotropy does not necessarily lead to the lowering of Tc in contrast to the monotonic dependence of Tc on the disorder measured in the temperature range of SMP effect. Additionally, a remarkable monotonic correlation between Tc and the glassy exponent s has been established.",

keywords = "Anisotropy and disorder, Bi-2212, Oxygen doping and Pb substitution, Vortex state",

author = "D. Darminto and M. Diantoro and Sutjahja, {I. M.} and Nugroho, {A. A.} and W. Loeksmanto and Tjia, {M. O.}",

note = "Funding Information: We wish to thank A.A. Menovsky and K. Kishio for the use of crystal growth facilities and experimental characterization apparatus respectively. This work is partly supported by RUT research grant under the contract no. 207/SP/RUT/BPPT/IV/97. One of authors (D.D.) would like to thank FOM-ALMOS and The Matsumae International Foundation for supporting his research respectively at the University of Amsterdam and the University of Tokyo. ",

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doi = "10.1016/S0921-4534(02)01475-2",

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TY - JOUR

T1 - Different roles of anisotropy and disorder on the vortex matter of Bi2Sr2CaCu2O8+δ single crystal

AU - Darminto, D.

AU - Diantoro, M.

AU - Sutjahja, I. M.

AU - Nugroho, A. A.

AU - Loeksmanto, W.

AU - Tjia, M. O.

N1 - Funding Information: We wish to thank A.A. Menovsky and K. Kishio for the use of crystal growth facilities and experimental characterization apparatus respectively. This work is partly supported by RUT research grant under the contract no. 207/SP/RUT/BPPT/IV/97. One of authors (D.D.) would like to thank FOM-ALMOS and The Matsumae International Foundation for supporting his research respectively at the University of Amsterdam and the University of Tokyo.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - The oxygen doped and Pb-substituted single crystalline Bi2Sr2CaCu2O8+δ samples having Tc,on and anisotropy (γ2) ranging respectively from 65 to 93 K and from 773 to 49,715 have been studied in the basis of magneto-resistance and magnetization data. It is found that the lowering of anisotropy due to higher oxygen content or Pb substitution is responsible for the reduction of magnetic field-induced transitional broadening and a shift of Hirr(T) and Hg(T) to higher temperatures and magnetic field. Meanwhile, the increasing disorder manifested by decreasing Tc also leads to the extended range of appearance for the second magnetization peak (SMP) and enlarged critical glassy region. It is shown that decreasing anisotropy does not necessarily lead to the lowering of Tc in contrast to the monotonic dependence of Tc on the disorder measured in the temperature range of SMP effect. Additionally, a remarkable monotonic correlation between Tc and the glassy exponent s has been established.

AB - The oxygen doped and Pb-substituted single crystalline Bi2Sr2CaCu2O8+δ samples having Tc,on and anisotropy (γ2) ranging respectively from 65 to 93 K and from 773 to 49,715 have been studied in the basis of magneto-resistance and magnetization data. It is found that the lowering of anisotropy due to higher oxygen content or Pb substitution is responsible for the reduction of magnetic field-induced transitional broadening and a shift of Hirr(T) and Hg(T) to higher temperatures and magnetic field. Meanwhile, the increasing disorder manifested by decreasing Tc also leads to the extended range of appearance for the second magnetization peak (SMP) and enlarged critical glassy region. It is shown that decreasing anisotropy does not necessarily lead to the lowering of Tc in contrast to the monotonic dependence of Tc on the disorder measured in the temperature range of SMP effect. Additionally, a remarkable monotonic correlation between Tc and the glassy exponent s has been established.

KW - Anisotropy and disorder

KW - Bi-2212

KW - Oxygen doping and Pb substitution

KW - Vortex state

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ER -

Different roles of anisotropy and disorder on the vortex matter of Bi₂Sr₂CaCu₂O_8+δ single crystal

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