Negative Divergence of Nonlinear Susceptibility at the Intergrain Phase Ordering Transitionin a Superconductive Ceramic of YBa2Cu4O8
Negative Divergence of Nonlinear Susceptibility at the Intergrain Phase Ordering Transitionin a Superconductive Ceramic of YBa2Cu4O8
复制标题
YBa2Cu4O8超导陶瓷晶间相有序转变非线性磁化率的负散度
DOI：
10.1143/jpsj.64.4540
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发表时间：
1995
影响因子：
1.7
通讯作者：
K. Koyama
中科院分区：
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作者：
M. Matsuura;M. Kawachi;K. Miyoshi;M. Hagiwara;K. Koyama
通过交流磁场测量，研究了YBa2Cu4O8超导陶瓷在零直流电场下的晶间相变特性。从弱交流场限下的非线性响应可以看出，在晶间转变温度Tc2处，非线性极化率χ_2出现负发散，而在晶内转变温度Tc1处没有发现明显的反常。这一临界现象可能表明手性玻璃有序在Tc2处的开始，并必然是晶间约瑟夫森型耦合网络的受挫。
The characteristic of intergrain phase ordering transition in a superconductive ceramic of YBa 2 Cu 4 O 8 is examined at zero external DC field by AC magnetic measurements. From the nonlinear response at the weak AC field limit, a negative divergence of nonlinear susceptibility χ 2 is concluded at the intergrain transition temperature T c2 but no remarkable anomaly is found at the intragrain one T c1 . This critical phenomenon may suggest the onset of chiral glass ordering at T c2 and necessarily a frustration in the intergrain Josephson type coupling network.
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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