Oh J I, Naughton M J
Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
Phys Rev Lett. 2004 Feb 13;92(6):067001. doi: 10.1103/PhysRevLett.92.067001. Epub 2004 Feb 10.
Cantilever magnetometry has been used to measure the upper critical magnetic field H(c2) of the quasi-one-dimensional molecular organic superconductor (TMTSF)2ClO4. From simultaneous resistivity and torque magnetization experiments conducted under precise field alignment, H(c2) at low temperature is shown to reach 5 T, nearly twice the Pauli paramagnetic limit imposed on spin singlet superconductors. These results constitute the first thermodynamic evidence for a large H(c2) in this system and provide support for spin triplet pairing in this unconventional superconductor.
悬臂磁力测量法已被用于测量准一维分子有机超导体(TMTSF)2ClO4的上临界磁场H(c2)。通过在精确的磁场取向条件下进行的电阻率和扭矩磁化同步实验表明，低温下的H(c2)可达5 T，几乎是自旋单重态超导体所受泡利顺磁极限的两倍。这些结果构成了该系统中存在大H(c2)的首个热力学证据，并为这种非常规超导体中的自旋三重态配对提供了支持。
