Effect of La substitution on the superconducting and magnetic properties of RuSr2(Eu1.5Ce0.5)Cu2Oz

被引：0
作者：
Lee, HK [1 ]
Kim, KD
Kim, YC
机构：
[1] Kangwon Natl Univ, Dept Phys, Chunchon 200701, South Korea
[2] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2004年 / 45卷 / 03期
关键词：
superconductivity; magnetic properties; Ru(Sr2-xLax )(Eu1.5Ce0.5)Cu2Oz; La doping; Nb doping;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Polycrystalline samples Of Ru(Sr2-xLax)(Eu1.5Ce0.5)Cu2Oz and (Ru0.5Nb0.5)(Sr2-xLax)(Eu-1.5 Ce-0.5)Cu2Ox (0 less than or equal to x less than or equal to 0.2) are synthesized to study the effects of La doping on the superconducting and magnetic properties of the Ru-1222-type compound which is a ferromagnetic superconductor. We find that, in contrast to the studies on Ru(Sr2-xLax)RCu2Ox (R. = Gd, Eu), there is no indication of an increase in the magnetic ordering temperature when La is substituted for Sr in the Ru(Sr2-xLax)(Eu1.5Ce0.5)Cu2Ox system. However, increasing the La content has the effects of increasing the normal state resistivity and slightly decreasing the T,. These features are also observed for the (Ru0.5Nb0.5)(Sr2-xLax)(Eu1.5Ce0.5)Cu2Oz system, in which the Nb substitution for Ru significantly reduces the ferromagnetic component of the magnetization, suggesting that the La-doping effects on superconductivity are insensitive to the magnetic ordering of Ru ions.
引用
收藏
页码：642 / 646
页数：5
相关论文
共 17 条
  • [1] Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr2GdCu2O8 studied by muon spin rotation and dc magnetization
    Bernhard, C
    Tallon, JL
    Niedermayer, C
    Blasius, T
    Golnik, A
    Brücher, E
    Kremer, RK
    Noakes, DR
    Stronach, CE
    Ansaldo, EJ
    [J]. PHYSICAL REVIEW B, 1999, 59 (21): : 14099 - 14107
  • [2] Evidence for a bulk Meissner state in the ferromagnetic superconductor RuSr2GdCu2O8 from dc magnetization
    Bernhard, C
    Tallon, JL
    Brücher, E
    Kremer, RK
    [J]. PHYSICAL REVIEW B, 2000, 61 (22) : 14960 - 14963
  • [3] Escote MT, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.144503
  • [4] Tuning of the superconducting and ferromagnetic behavior by oxygen and hydrogen in Eu1.5Ce0.5RuSr2Cu2O10-δ
    Felner, I
    Asaf, U
    Levi, Y
    Millo, O
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2000, 334 (3-4): : 141 - 151
  • [5] Coexistence of magnetism and superconductivity in R(1.4)Ce(0.6)RuSr(2)Cu(2)O(10-delta) (R=Eu and Gd)
    Felner, I
    Asaf, U
    Levi, Y
    Millo, O
    [J]. PHYSICAL REVIEW B, 1997, 55 (06) : R3374 - R3377
  • [6] Transport and magnetic properties of Ru(Sr1-xLax)2RCu2O8 (R = Gd, Eu) superconductor
    Hassen, A
    Mandal, P
    Hemberger, J
    Krimmel, A
    Choudhury, P
    Ghosh, B
    Loidl, A
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 398 (3-4): : 123 - 130
  • [7] Superconducting and magnetic properties of (Ru1-xNbx)Sr2(Eu1.5Ce0.5)Cu2Ox
    Lee, HK
    Kim, YC
    [J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2003, 17 (18-20): : 3682 - 3687
  • [8] Lee HK, 2000, J KOREAN PHYS SOC, V36, P384
  • [9] LEE HS, UNPUB
  • [10] Structural, transport, and magnetic properties of pure and La-doped RuSr2GdCu2O8 -: art. no. 144506
    Mandal, P
    Hassen, A
    Hemberger, J
    Krimmel, A
    Loidl, A
    [J]. PHYSICAL REVIEW B, 2002, 65 (14) : 1 - 8
12