Investigation of harmonic generation in the alternating magnetic response of superconducting Y‐Ba‐Cu‐O
Investigation of harmonic generation in the alternating magnetic response of superconducting Y‐Ba‐Cu‐O
复制标题
超导Y-Ba-Cu-O交变磁响应中谐波产生的研究
DOI：
10.1063/1.100544
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发表时间：
1988
影响因子：
4
通讯作者：
D. Dorman
中科院分区：
文献类型：
--
作者：
A. Shaulov;D. Dorman
通过监测其对交变磁场的磁响应的谐波分量，研究了烧结 Y-Ba-Cu-O 超导体的磁行为。随着稳定偏置场逐渐升高，响应中磁损耗和奇次谐波分量的出现表明磁化从线性可逆行为转变为非线性不可逆行为。当偏置场或温度升高到某一点以上时，这些谐波就会消失，表明存在线性行为。奇次谐波的消失，而磁损耗仍然存在，被解释为意味着向无钉扎的耗散磁通运动状态的转变。这些测量展示了一种确定较低临界磁场和“不可逆”磁场的新技术，低于该磁场时，磁通钉扎会导致磁化不可逆。
The magnetic behavior of a sintered Y‐Ba‐Cu‐O superconductor has been investigated by monitoring the harmonic components of its magnetic response to an alternating field. As the steady bias field is incrementally raised, a transition from a linear, reversible behavior of the magnetization to a nonlinear, irreversible behavior is indicated by the appearance of magnetic losses and odd harmonic components in the response. These harmonics disappear as the bias field or the temperature is increased above a certain point, indicating a linear behavior. The disappearance of the odd harmonics, while the magnetic losses persist, is interpreted as signifying a transition to a state of dissipative flux motion without pinning. These measurements demonstrate a new technique for determination of the lower critical field and the ‘‘irreversibility’’ field below which irreversibility in the magnetization sets in as a result of flux pinning.