Superconducting Transition Temperature and Metal--Semiconductor Transition Temperature in
YBa2Cu4O8/La0.67Ca0.33MnO3/YBa2Cu4O8 Trilayer Films

Chin. Phys. Lett.

2004, Vol. 21

Issue (12): 2514-2517 DOI:

Original Articles

Superconducting Transition Temperature and Metal--Semiconductor Transition Temperature in YBa₂Cu₄O₈/La_0.67Ca_0.33MnO₃/YBa₂Cu₄O₈ Trilayer Films

ZHAO Kun^1,2;HUANG Yan-Hong¹;FENG Jia-Feng¹;WONG Hong-Kuen³

¹Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 ²International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016 ³Department of Physics, The Chinese University of Hong Kong, Hong Kong

Cite this article:

ZHAO Kun, HUANG Yan-Hong, FENG Jia-Feng et al 2004 Chin. Phys. Lett. 21 2514-2517

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Abstract YBa₂Cu₄O₈/La_0.67Ca_0.33MnO₃/YBa₂Cu₄O₈(YBCO/LCMO/YBCO) trilayer films were prepared by magnetron facing-target sputtering. For the first time, the oscillatory behaviour of superconducting transition temperature T_c,ON with the thickness of LCMO (d_L) has been observed. The strongest nonmonotonic information in the T_c,ON--d_L curves appears clearly when d_L is larger than the critical thickness d_L^CR. The metal--semiconductor transition temperature can only be detected at d_L>d_L^CR. The dependence on the ferromagnetic spacer layer in YBCO/LCMO/YBCO systems suggests strongly the interplay of ferromagnetic and superconducting couplings.

Keywords: 74.78.Bz 75.47.Gk 71.70.Gm

Published: 01 December 2004

PACS:	74.78.Bz
	75.47.Gk	(Colossal magnetoresistance)
	71.70.Gm	(Exchange interactions)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2004/V21/I12/02514

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	ZHAO Kun
	HUANG Yan-Hong
	FENG Jia-Feng
	WONG Hong-Kuen

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