论文标题
超导体中固定力密度的新缩放定律
New scaling laws for pinning force density in superconductors
论文作者
论文摘要
自Fietz和Webb（1968Phys。Rev.178 657）的报告以来，他考虑了固定力量密度，$ | f_p | = |J_c \times B|$ (where $J_c$ is the critical current density and $B$ is applied magnetic field), in isotropic superconductors as a unique function of the reduced applied field, $B/B_{c2}$ (where $B_c2$ is the upper critical field), $|F_p|$ has been scaled based on B/B_c2 ratio, for which there is widely used scaling law of $|F_p(B)|=F_{p,max}((B/B_{c2})^p)((1-B/B_{c2})^q)$, where $F_{p,max}$, $B_{c2}$, $p$, and $q$ are free-fitting parameters, proposed by Kramer (1973 J. Appl. Phys. 44 1360) and Dew-Hughes（1974Phil。Mag。30293）。要描述$ | f_p（b）| $在高温超导体中，Kramer-Dew-dew-dew-dew-hughes缩放定律是通过（a）假设所有自由拟合参数在旋转角度上的角度依赖性的假设，并且（b）通过$ b_ {c2} $替换，由$ b_ {c2} $替换，$ b_ {c2} $ nir ir re-b_ $ b。在这里，我们注意到，固定力密度也是关键电流密度的函数，因此，应该存在$ | f_p（J_C）| $缩放定律。为了揭示该法律，我们考虑了整个$ | f_p（b，j_c）| $函数，并报告说，有三个独特的特征范围$（b/b_ {c2}，j_c/（j_c（sf））$（$ j_c（sf（sf））$是$ | f_p（其中$ j_c（sf（sf））$是$ | f_p（b，b，j_p）。提出，讨论，讨论并应用了$ | f_p（J_C）| $的几个新缩放法律，并应用于MGB2，NDFEAS（O，F），REBCO和近房间温度超过Super Super Hydrides（LA，Y，Y）H10和YH6中的$ | f_p（j_c）| $。我们指出，固定力密度的一般缩放定律正在探索中。
Since the report by Fietz and Webb (1968 Phys. Rev. 178 657), who considered the pinning force density, $|F_p| = |J_c \times B|$ (where $J_c$ is the critical current density and $B$ is applied magnetic field), in isotropic superconductors as a unique function of the reduced applied field, $B/B_{c2}$ (where $B_c2$ is the upper critical field), $|F_p|$ has been scaled based on B/B_c2 ratio, for which there is widely used scaling law of $|F_p(B)|=F_{p,max}((B/B_{c2})^p)((1-B/B_{c2})^q)$, where $F_{p,max}$, $B_{c2}$, $p$, and $q$ are free-fitting parameters, proposed by Kramer (1973 J. Appl. Phys. 44 1360) and Dew-Hughes (1974 Phil. Mag. 30 293). To describe $|F_p(B)|$ in high-temperature superconductors, Kramer-Dew-Hughes scaling law was modified by (a) an assumption of the angular dependence of all free-fitting parameters on the rotation angle and (b) by the replacement of the upper critical field, $B_{c2}$, by the irreversibility field, $B_{irr}$. Here we note that the pinning force density is also a function of critical current density and, thus, $|F_p(J_c)|$ scaling law should exist. In an attempt to reveal this law, we considered the full $|F_p(B,J_c)|$ function and reported that there are three distinctive characteristic ranges of $(B/B_{c2}, J_c/(J_c(sf)))$ (where $J_c(sf)$ is the self-field critical current density) on which $|F_p(B,J_c)|$ can be splatted. Several new scaling laws for $|F_p(J_c)|$ were proposed, discussed, and applied to scale $|F_p(J_c)|$ in MgB2, NdFeAs(O,F), REBCO, and near-room temperature superconducting super hydrides (La,Y)H10 and YH6. We pointed out that the general scaling law for the pinning force density is on the quest.
