Transport properties and Raman scattering studies of superconducting ferromagnet Ru1-xAlxSr2GdCu2O8

D. C. Ling, S. G. Yang, S. C. Hsu, H. L. Liu

Research output: Contribution to journalArticle

Abstract

Transport properties and Raman spectra of Ru1-x AlxSr2 GdCu2 O8 (Al-doped Ru-1212) with x=0, 0.05, 0.1 and 0.15 have been investigated. The superconducting transition temperature of the Al-doped Ru-1212 increases with increasing Al content up to 10%, and then decreases with increasing Al content. The observed result seems to indicate that excess holes induced by Al doping could transfer from RuO2 plane to CuO2 plane through apical oxygen for 0≤ x ≤ 0.1. Whereas for x ≥ 0.1, the holes might be trapped or localized in the RuO2 plane due to a local disorder induced by Al doping. The temperature dependence of the critical field can be fitted as Hc2 (T) = 34 (1-T/Tc)4.8, suggesting that the vortex dynamics of Ru-1212 might be intrinsically different from that of the other high-Tc cuprates. The largest magnetoresistance (MR of the Al-doped Ru-1212 occurs around magnetic ordering temperature, indicating that the exchange interaction between the carriers in CuO2 planes and the spins in RuO2 planes dominates the magneto-transport properties of the Ru-1212 system. The peak position of the 150 cm-1 involving Cu vibration along the c-axis hardly changes as x increases. It reveals that Al doesn't occupy Cu site. A new Raman active mode around 550 cm-1 observed in the Al-doped compounds might be attributed to doping-induced A1g-like apical oxygen mode.

Original languageEnglish
Pages (from-to)659-664
Number of pages6
JournalJournal of Low Temperature Physics
Volume131
Issue number3-4
DOIs
Publication statusPublished - 2003 May 1

Fingerprint

Transport properties
Raman scattering
transport properties
Doping (additives)
Raman spectra
scattering
Oxygen
Exchange interactions
oxygen
Magnetoresistance
cuprates
Superconducting transition temperature
Magnetization
Vortex flow
transition temperature
disorders
vortices
vibration
Temperature
temperature dependence

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Transport properties and Raman scattering studies of superconducting ferromagnet Ru1-xAlxSr2GdCu2O8. / Ling, D. C.; Yang, S. G.; Hsu, S. C.; Liu, H. L.

In: Journal of Low Temperature Physics, Vol. 131, No. 3-4, 01.05.2003, p. 659-664.

Research output: Contribution to journalArticle

@article{60035b661f5543c98b019d1f7239f594,
title = "Transport properties and Raman scattering studies of superconducting ferromagnet Ru1-xAlxSr2GdCu2O8",
abstract = "Transport properties and Raman spectra of Ru1-x AlxSr2 GdCu2 O8 (Al-doped Ru-1212) with x=0, 0.05, 0.1 and 0.15 have been investigated. The superconducting transition temperature of the Al-doped Ru-1212 increases with increasing Al content up to 10{\%}, and then decreases with increasing Al content. The observed result seems to indicate that excess holes induced by Al doping could transfer from RuO2 plane to CuO2 plane through apical oxygen for 0≤ x ≤ 0.1. Whereas for x ≥ 0.1, the holes might be trapped or localized in the RuO2 plane due to a local disorder induced by Al doping. The temperature dependence of the critical field can be fitted as Hc2 (T) = 34 (1-T/Tc)4.8, suggesting that the vortex dynamics of Ru-1212 might be intrinsically different from that of the other high-Tc cuprates. The largest magnetoresistance (MR of the Al-doped Ru-1212 occurs around magnetic ordering temperature, indicating that the exchange interaction between the carriers in CuO2 planes and the spins in RuO2 planes dominates the magneto-transport properties of the Ru-1212 system. The peak position of the 150 cm-1 involving Cu vibration along the c-axis hardly changes as x increases. It reveals that Al doesn't occupy Cu site. A new Raman active mode around 550 cm-1 observed in the Al-doped compounds might be attributed to doping-induced A1g-like apical oxygen mode.",
author = "Ling, {D. C.} and Yang, {S. G.} and Hsu, {S. C.} and Liu, {H. L.}",
year = "2003",
month = "5",
day = "1",
doi = "10.1023/A:1022900714129",
language = "English",
volume = "131",
pages = "659--664",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer New York",
number = "3-4",

}

TY - JOUR

T1 - Transport properties and Raman scattering studies of superconducting ferromagnet Ru1-xAlxSr2GdCu2O8

AU - Ling, D. C.

AU - Yang, S. G.

AU - Hsu, S. C.

AU - Liu, H. L.

PY - 2003/5/1

Y1 - 2003/5/1

N2 - Transport properties and Raman spectra of Ru1-x AlxSr2 GdCu2 O8 (Al-doped Ru-1212) with x=0, 0.05, 0.1 and 0.15 have been investigated. The superconducting transition temperature of the Al-doped Ru-1212 increases with increasing Al content up to 10%, and then decreases with increasing Al content. The observed result seems to indicate that excess holes induced by Al doping could transfer from RuO2 plane to CuO2 plane through apical oxygen for 0≤ x ≤ 0.1. Whereas for x ≥ 0.1, the holes might be trapped or localized in the RuO2 plane due to a local disorder induced by Al doping. The temperature dependence of the critical field can be fitted as Hc2 (T) = 34 (1-T/Tc)4.8, suggesting that the vortex dynamics of Ru-1212 might be intrinsically different from that of the other high-Tc cuprates. The largest magnetoresistance (MR of the Al-doped Ru-1212 occurs around magnetic ordering temperature, indicating that the exchange interaction between the carriers in CuO2 planes and the spins in RuO2 planes dominates the magneto-transport properties of the Ru-1212 system. The peak position of the 150 cm-1 involving Cu vibration along the c-axis hardly changes as x increases. It reveals that Al doesn't occupy Cu site. A new Raman active mode around 550 cm-1 observed in the Al-doped compounds might be attributed to doping-induced A1g-like apical oxygen mode.

AB - Transport properties and Raman spectra of Ru1-x AlxSr2 GdCu2 O8 (Al-doped Ru-1212) with x=0, 0.05, 0.1 and 0.15 have been investigated. The superconducting transition temperature of the Al-doped Ru-1212 increases with increasing Al content up to 10%, and then decreases with increasing Al content. The observed result seems to indicate that excess holes induced by Al doping could transfer from RuO2 plane to CuO2 plane through apical oxygen for 0≤ x ≤ 0.1. Whereas for x ≥ 0.1, the holes might be trapped or localized in the RuO2 plane due to a local disorder induced by Al doping. The temperature dependence of the critical field can be fitted as Hc2 (T) = 34 (1-T/Tc)4.8, suggesting that the vortex dynamics of Ru-1212 might be intrinsically different from that of the other high-Tc cuprates. The largest magnetoresistance (MR of the Al-doped Ru-1212 occurs around magnetic ordering temperature, indicating that the exchange interaction between the carriers in CuO2 planes and the spins in RuO2 planes dominates the magneto-transport properties of the Ru-1212 system. The peak position of the 150 cm-1 involving Cu vibration along the c-axis hardly changes as x increases. It reveals that Al doesn't occupy Cu site. A new Raman active mode around 550 cm-1 observed in the Al-doped compounds might be attributed to doping-induced A1g-like apical oxygen mode.

UR - http://www.scopus.com/inward/record.url?scp=0037766210&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037766210&partnerID=8YFLogxK

U2 - 10.1023/A:1022900714129

DO - 10.1023/A:1022900714129

M3 - Article

AN - SCOPUS:0037766210

VL - 131

SP - 659

EP - 664

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 3-4

ER -