Magnetism and superconductivity in La0.7Ca0.3MnO3/YBa2Cu3O7−δ superlattices | Zendy

P. Prieto | Zendy; P. Vivas | Zendy; G. Campillo | Zendy; E. Baca | Zendy; L.F. Castro | Zendy; M. Varela | Zendy; C. Ballesteros | Zendy; Javier E. Villegas | Zendy; D. Arias | Zendy; C. León | Zendy; J. Santamarı́a | Zendy

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Magnetism and superconductivity in La0.7Ca0.3MnO3/YBa2Cu3O7−δ superlattices

Author(s) -

P. Prieto,

P. Vivas,

G. Campillo,

E. Baca,

L.F. Castro,

M. Varela,

C. Ballesteros,

Javier E. Villegas,

D. Arias,

C. León,

J. Santamarı́a

Publication year - 2001

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1370994

Subject(s) - superlattice , condensed matter physics , magnetism , superconductivity , ferromagnetism , magnetization , materials science , transmission electron microscopy , bilayer , chemistry , magnetic field , nanotechnology , physics , biochemistry , quantum mechanics , membrane

We report on the magnetic and superconducting properties of La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7) (LCMO/YBCO) superlattices. For a constant LCMO layer thickness of 6 unit cells (u.c.), resistance and susceptibility measurements show superconductivity for YBCO layer thickness in excess of 4 unit cells. The critical temperature increases with YBCO thickness, and a T_(c) of 58 K is found for a YBCO thickness of 10 unit cells. Magnetization measurements show a ferromagnetic transition at 100 K in a (LCMO_(6u.c.)/YBCO_(5 u.c.))_(15 bilayer) superlattice, and a depressed value of the saturation magnetization of 20 emu cm^(-3). These results are discussed in terms of interface disorder (analyzed by x-ray diffraction and transmission electron microscopy) and of the possible interaction between magnetism and superconductivity

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