Comment on {open_quotes}Magnetic-coherence-length scaling in metallic multilayers{close_quotes}
- Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9506, 2300 RA Leiden (The Netherlands)
In a recent paper [Phys. Rev. B {bold 54}, 515 (1996)], Koperdraad and Lodder compare calculations of the parallel critical field H{sub c2}{sup {parallel}} in superconductor{endash}normal-metal multilayers with experimental data taken from the literature. The poor agreement leads them to introduce a scaling factor {alpha} in the superconducting coherence length. The aim of this Comment is to point out the importance of the boundary conditions of the problem. Free sample surfaces will yield different results than an infinite stack of layers. The effect of free surfaces on the temperature of the dimensional crossover in H{sub c2}{sup {parallel}} is shown to be similar to the effect of {alpha}, making the need for the latter parameter questionable. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 632626
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 13; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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