Guimpel, J., P. HÃ¸ghÃ¸j, I. K. Schuller, J. Vanacken, and Y. Bruynseraede. "Scaling of the irreversibility line in a low temperature superconducting oxide." Physica C: Superconductivity 175, no. 1-2 (1991): 197–201.
Abstract: We have studied the critical field and irreversibility line on the magnetization of the ceramic oxide LiTi2O4. The irreversibility line scales with the critical field while the coherence length of the material changes by a factor of two. This universal behavior indicates that the origin of the irreversibility line does not depend on extrinsic factors and relies solely on the intrinsic superconducting parameters of the material.