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Volumn 80, Issue 5, 2009, Pages

Suppression of the superconducting transition of R FeAsO1-x Fx (R=Tb, Dy, and Ho)

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EID: 70249132144     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.052508     Document Type: Article
Times cited : (25)

References (22)
  • 2
    • 65549163063 scopus 로고    scopus 로고
    • 10.1016/j.physc.2009.03.046
    • J. W. Lynn and P. Dai, Physica C 469, 469 (2009). 10.1016/j.physc.2009. 03.046
    • (2009) Physica C , vol.469 , pp. 469
    • Lynn, J.W.1    Dai, P.2
  • 11
    • 70249120088 scopus 로고    scopus 로고
    • Samples were synthesized from stoichiometric amounts of RAs, Fe2 O3, FeF2, and Fe, using a Walker multianvil module within a 1000 ton press. The products were dense, black, sintered polycrystalline pellets. Powder x-ray diffraction data were collected on a Bruker AXS D8 diffractometer using CuK α1 radiation. Data were recorded at 10≤2θ≤100°with a step size of 0.007°for Rietveld analysis. ac magnetic susceptibility was measured from 3 to 50 K with a field of 0.5 Oe oscillating at 117 Hz using a Quantum Design SQUID magnetometer. Electrical resistivity was measured by a four-probe method between 1.7 and 300 K using a Quantum Design physical property measurement system and an APD cryogenics closed cycle refrigeration unit with an in-house built sample stage.
    • Samples were synthesized from stoichiometric amounts of RAs, Fe2 O3, FeF2, and Fe, using a Walker multianvil module within a 1000 ton press. The products were dense, black, sintered polycrystalline pellets. Powder x-ray diffraction data were collected on a Bruker AXS D8 diffractometer using CuK α1 radiation. Data were recorded at 10≤2θ≤100°with a step size of 0.007°for Rietveld analysis. ac magnetic susceptibility was measured from 3 to 50 K with a field of 0.5 Oe oscillating at 117 Hz using a Quantum Design SQUID magnetometer. Electrical resistivity was measured by a four-probe method between 1.7 and 300 K using a Quantum Design physical property measurement system and an APD cryogenics closed cycle refrigeration unit with an in-house built sample stage.
  • 13
    • 70249143704 scopus 로고    scopus 로고
    • 2, β=100.08 (1)°.
    • 2, β=100.08 (1)°.
  • 17
    • 45249110406 scopus 로고    scopus 로고
    • 10.1103/PhysRevLett.100.237003
    • D. J. Singh and M.-H. Du, Phys. Rev. Lett. 100, 237003 (2008). 10.1103/PhysRevLett.100.237003
    • (2008) Phys. Rev. Lett. , vol.100 , pp. 237003
    • Singh, D.J.1    Du, M.-H.2
  • 18
    • 70249141346 scopus 로고    scopus 로고
    • The compositional d Tc /dV quantifies the changes in Tc and unit-cell volume V due to variations in doping level x at constant (atmospheric) pressure, and is complementary to the pressure-induced d Tc /dV at constant x. Both derivatives are negative for LaFeAsO1-x Fx, and we thus predict a positive pressure-induced d Tc /dV (pressure suppression of superconductivity) for HoFeAsO1-x Fx.
    • The compositional d Tc /dV quantifies the changes in Tc and unit-cell volume V due to variations in doping level x at constant (atmospheric) pressure, and is complementary to the pressure-induced d Tc /dV at constant x. Both derivatives are negative for LaFeAsO1-x Fx, and we thus predict a positive pressure-induced d Tc /dV (pressure suppression of superconductivity) for HoFeAsO1-x Fx.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.