Intergrain Ordering of a Superconductive Ceramic of YBa 2Cu 4O 8 at Zero External Magnetic Field Studied by Linear and Nonlinear Transport Coefficients
Intergrain Ordering of a Superconductive Ceramic of YBa 2Cu 4O 8 at Zero External Magnetic Field Studied by Linear and Nonlinear Transport Coefficients
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利用线性和非线性输运系数研究零外磁场下YBa 2Cu 4O 8 超导陶瓷的晶间有序性
DOI：
10.1143/jpsj.68.871
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发表时间：
1999
影响因子：
1.7
通讯作者：
M. Matsuura
中科院分区：
文献类型：
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作者：
T. Yamao;M. Hagiwara;K. Koyama;M. Matsuura
用交流电阻率测量方法研究了YBa2Cu4O8陶瓷在零外磁场下的晶粒间有序性。弱交流电流的三次谐波同相电压分量V ' 3ω在晶间转变温度TC2处有明显的负峰，而在晶内转变温度TC1处没有明显的负峰（TC2 <TC1）。在交流电流消失的极限下，非线性电阻率ρ 2在TC2处发散，而线性电阻率ρ 0在TC2处或低于TC2时仍然是有限的。这种特征性的临界行为的晶粒间有序的本陶瓷强烈建议最近预测的手征玻璃有序发生在高T C陶瓷。
The intergrain ordering in a superconductive ceramic of YBa 2 Cu 4 O 8 at zero external magnetic field is investigated by AC resistivity measurements. The third harmonic in-phase voltage component V ' 3ω to a weak AC current shows a distinct negative peak across the intergrain transition temperature T C2 , but not across the intragrain one T C1 ( T C2 < T C1 ). A divergence of the nonlinear resistivity ρ 2 is concluded at T C2 in the limit of vanishing AC current, while the linear resistivity ρ 0 remains finite even at and below T C2 . Such characteristic critical behaviors of the intergrain ordering of the present superconductive ceramic strongly suggest a chiral glass ordering recently predicted to occur in high- T C superconductive ceramics.
H.Kawamura：“d 波陶瓷中轨道玻璃化转变的性质”J.Phys.Soc.Jpn.(1995)
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