Thermodynamic fluctuations in T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal

Abstract

Series of M-T measurements have been conducted on the T(*)-phase SmLa_0.8Sr_0.2CuO_4-δ single crystal (T_c^on≈24 K) in a broad range of magnetic field (1000 Oe-10 kOe) applied along the crystal c-axis. The result clearly establishes the existence of a crossing point (M*, T *), signifying an intrinsic thermal fluctuations effect in this system. The effective CuO₂ interlayer distance deduced from this analysis is s≈15.50 Å, in a good agreement with the XRD refinement result. The effective dimensionality of fluctuations associated with the thermodynamic scaling properties of magnetization is analyzed on the basis of Ginzburg-Landau (GL) theory with the order parameter restricted to the lowest Landau level (GL-LLL) as well as the XY fluctuations model. It is shown that the data for the field above or equal to 8000 Oe exhibit distinct scaling behavior characteristic of the 2D GL-LLL fluctuation model. It also shows a clear departure from this and the corresponding 3D model in the lower field regime considered in this work.

Keywords

Crossing point
GL-LLL theory
Magnetization
SmLaSrCuO single crystal
Thermodynamic scaling

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10.1016/S0921-4534(01)01261-8

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@article{30c89a9bc1554e8aa985198ffd1b3161,

title = "Thermodynamic fluctuations in T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal",

abstract = "Series of M-T measurements have been conducted on the T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal (Tcon≈24 K) in a broad range of magnetic field (1000 Oe-10 kOe) applied along the crystal c-axis. The result clearly establishes the existence of a crossing point (M*, T *), signifying an intrinsic thermal fluctuations effect in this system. The effective CuO2 interlayer distance deduced from this analysis is s≈15.50 {\AA}, in a good agreement with the XRD refinement result. The effective dimensionality of fluctuations associated with the thermodynamic scaling properties of magnetization is analyzed on the basis of Ginzburg-Landau (GL) theory with the order parameter restricted to the lowest Landau level (GL-LLL) as well as the XY fluctuations model. It is shown that the data for the field above or equal to 8000 Oe exhibit distinct scaling behavior characteristic of the 2D GL-LLL fluctuation model. It also shows a clear departure from this and the corresponding 3D model in the lower field regime considered in this work.",

keywords = "Crossing point, GL-LLL theory, Magnetization, SmLaSrCuO single crystal, Thermodynamic scaling",

author = "Sutjahja, {I. M.} and D. Darminto and R. Sutarto and Nugroho, {A. A.} and Tjia, {M. O.} and Menovsky, {A. A.} and Franse, {J. J.M.}",

note = "Funding Information: We are grateful to FOM-ALMOS for the use of sample preparation and characterization facilities. This work was carried out under the cooperation of Van der Waals–Zeeman Institute and Jurusan Fisika ITB supported by KNAW under project no. 95-BTM-33. One of us (IMS) would like to acknowledge the European Science Foundation (ESF) program VORTEX for the full board accommodation during the conference.",

year = "2002",

month = mar,

day = "15",

doi = "10.1016/S0921-4534(01)01261-8",

language = "English",

volume = "369",

pages = "291--294",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Thermodynamic fluctuations in T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal

AU - Sutjahja, I. M.

AU - Darminto, D.

AU - Sutarto, R.

AU - Nugroho, A. A.

AU - Tjia, M. O.

AU - Menovsky, A. A.

AU - Franse, J. J.M.

N1 - Funding Information: We are grateful to FOM-ALMOS for the use of sample preparation and characterization facilities. This work was carried out under the cooperation of Van der Waals–Zeeman Institute and Jurusan Fisika ITB supported by KNAW under project no. 95-BTM-33. One of us (IMS) would like to acknowledge the European Science Foundation (ESF) program VORTEX for the full board accommodation during the conference.

PY - 2002/3/15

Y1 - 2002/3/15

N2 - Series of M-T measurements have been conducted on the T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal (Tcon≈24 K) in a broad range of magnetic field (1000 Oe-10 kOe) applied along the crystal c-axis. The result clearly establishes the existence of a crossing point (M*, T *), signifying an intrinsic thermal fluctuations effect in this system. The effective CuO2 interlayer distance deduced from this analysis is s≈15.50 Å, in a good agreement with the XRD refinement result. The effective dimensionality of fluctuations associated with the thermodynamic scaling properties of magnetization is analyzed on the basis of Ginzburg-Landau (GL) theory with the order parameter restricted to the lowest Landau level (GL-LLL) as well as the XY fluctuations model. It is shown that the data for the field above or equal to 8000 Oe exhibit distinct scaling behavior characteristic of the 2D GL-LLL fluctuation model. It also shows a clear departure from this and the corresponding 3D model in the lower field regime considered in this work.

AB - Series of M-T measurements have been conducted on the T(*)-phase SmLa0.8Sr0.2CuO4-δ single crystal (Tcon≈24 K) in a broad range of magnetic field (1000 Oe-10 kOe) applied along the crystal c-axis. The result clearly establishes the existence of a crossing point (M*, T *), signifying an intrinsic thermal fluctuations effect in this system. The effective CuO2 interlayer distance deduced from this analysis is s≈15.50 Å, in a good agreement with the XRD refinement result. The effective dimensionality of fluctuations associated with the thermodynamic scaling properties of magnetization is analyzed on the basis of Ginzburg-Landau (GL) theory with the order parameter restricted to the lowest Landau level (GL-LLL) as well as the XY fluctuations model. It is shown that the data for the field above or equal to 8000 Oe exhibit distinct scaling behavior characteristic of the 2D GL-LLL fluctuation model. It also shows a clear departure from this and the corresponding 3D model in the lower field regime considered in this work.

KW - Crossing point

KW - GL-LLL theory

KW - Magnetization

KW - SmLaSrCuO single crystal

KW - Thermodynamic scaling

UR - http://www.scopus.com/inward/record.url?scp=0037086903&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(01)01261-8

DO - 10.1016/S0921-4534(01)01261-8

M3 - Article

AN - SCOPUS:0037086903

SN - 0921-4534

VL - 369

SP - 291

EP - 294

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

ER -

Thermodynamic fluctuations in T(*)-phase SmLa_0.8Sr_0.2CuO_4-δ single crystal

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