The role of charge carrier concentration in Tl-1234

Nasser M. Hamdan

doi:10.1016/S0921-4526(99)02443-6

The role of charge carrier concentration in Tl-1234

Nasser M. Hamdan^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

9 Scopus citations

Abstract

Three (Tl_0.5Pb_0.5)Sr_1.6Ba_0.4Ca ₃Cu₄O_y (Tl-1234) samples with different charge carrier concentrations were investigated. One sample was air-annealed, the second was annealed in O₂ flowing atmosphere and the third was annealed in air but one-quarter of the Cu content was obtained from CuF₂ rather than CuO. The first two samples were superconducting with onset T_c = 128 K while the third was non-superconducting. An information about the charge carrier state of samples 1 and 2 was obtained from the normal state resistivity. XRD analysis shows that the three samples have the expected structure and lattice parameters for the Tl-1234 and confirms that fluorine (F) enters the structure of Tl-1234 phase and affects its charge carrier concentration. The high fluorine content in the third sample greatly changed the hole concentration in the Cu-O planes and destroyed the superconductivity in the Tl-1234 phase.

Original language	English
Pages (from-to)	1093-1094
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART I
DOIs	https://doi.org/10.1016/S0921-4526(99)02443-6
State	Published - 2000

Bibliographical note

Funding Information:
We would like to acknowledge the support of KFUPM for this work.

Keywords

Charge carrier concentration
Tl-1234

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(99)02443-6

Cite this

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title = "The role of charge carrier concentration in Tl-1234",

abstract = "Three (Tl0.5Pb0.5)Sr1.6Ba0.4Ca 3Cu4Oy (Tl-1234) samples with different charge carrier concentrations were investigated. One sample was air-annealed, the second was annealed in O2 flowing atmosphere and the third was annealed in air but one-quarter of the Cu content was obtained from CuF2 rather than CuO. The first two samples were superconducting with onset Tc = 128 K while the third was non-superconducting. An information about the charge carrier state of samples 1 and 2 was obtained from the normal state resistivity. XRD analysis shows that the three samples have the expected structure and lattice parameters for the Tl-1234 and confirms that fluorine (F) enters the structure of Tl-1234 phase and affects its charge carrier concentration. The high fluorine content in the third sample greatly changed the hole concentration in the Cu-O planes and destroyed the superconductivity in the Tl-1234 phase.",

keywords = "Charge carrier concentration, Tl-1234",

author = "Hamdan, \{Nasser M.\}",

note = "Funding Information: We would like to acknowledge the support of KFUPM for this work.",

year = "2000",

doi = "10.1016/S0921-4526(99)02443-6",

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pages = "1093--1094",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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T1 - The role of charge carrier concentration in Tl-1234

AU - Hamdan, Nasser M.

N1 - Funding Information: We would like to acknowledge the support of KFUPM for this work.

PY - 2000

Y1 - 2000

N2 - Three (Tl0.5Pb0.5)Sr1.6Ba0.4Ca 3Cu4Oy (Tl-1234) samples with different charge carrier concentrations were investigated. One sample was air-annealed, the second was annealed in O2 flowing atmosphere and the third was annealed in air but one-quarter of the Cu content was obtained from CuF2 rather than CuO. The first two samples were superconducting with onset Tc = 128 K while the third was non-superconducting. An information about the charge carrier state of samples 1 and 2 was obtained from the normal state resistivity. XRD analysis shows that the three samples have the expected structure and lattice parameters for the Tl-1234 and confirms that fluorine (F) enters the structure of Tl-1234 phase and affects its charge carrier concentration. The high fluorine content in the third sample greatly changed the hole concentration in the Cu-O planes and destroyed the superconductivity in the Tl-1234 phase.

AB - Three (Tl0.5Pb0.5)Sr1.6Ba0.4Ca 3Cu4Oy (Tl-1234) samples with different charge carrier concentrations were investigated. One sample was air-annealed, the second was annealed in O2 flowing atmosphere and the third was annealed in air but one-quarter of the Cu content was obtained from CuF2 rather than CuO. The first two samples were superconducting with onset Tc = 128 K while the third was non-superconducting. An information about the charge carrier state of samples 1 and 2 was obtained from the normal state resistivity. XRD analysis shows that the three samples have the expected structure and lattice parameters for the Tl-1234 and confirms that fluorine (F) enters the structure of Tl-1234 phase and affects its charge carrier concentration. The high fluorine content in the third sample greatly changed the hole concentration in the Cu-O planes and destroyed the superconductivity in the Tl-1234 phase.

KW - Charge carrier concentration

KW - Tl-1234

UR - https://www.scopus.com/pages/publications/0033705361

U2 - 10.1016/S0921-4526(99)02443-6

DO - 10.1016/S0921-4526(99)02443-6

M3 - Article

AN - SCOPUS:0033705361

SN - 0921-4526

VL - 284-288

SP - 1093

EP - 1094

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART I

ER -

The role of charge carrier concentration in Tl-1234

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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