Magnetic properties ofLa0.67Sr0.33MnO3

Magnetic properties and atomic structure of La2/3Ca1/3MnO3–YBa2Cu3O7 heterointerfaces

“…In particular, high-quality heterostructures of the metallic ferromagnet La 2/3 Ca 1/3 MnO 3 (LCMO) and the high-temperature superconductor YBa 2 Cu 3 O 7 (YBCO) have been prepared by pulsed-laser deposition (PLD) and investigated with a variety of experimental methods [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. While interesting macroscopic properties such as exchange bias [7] and giant magnetoresistance [10] were observed in some of these structures, the presence of microscopic proximity effects is still under intense investigation [3]. Some experiments have yielded evidence of a strongly suppressed ferromagnetic magnetization on the LCMO side of the interface [5,12], whereas others conclude that copper spins on the YBCO side of the interface are polarized by exchange interactions across the interface, partially compensating the ferromagnetic magnetization of LCMO [13].…”

Electrical characteristics of HTS/manganite double layers

“…Reduction of T C and J C in YBCO/LSMO double layers is partly due to the antagonistic ground states of ferromagnetic (spin-oriented electrons) and superconductor (paired charge carriers) oxide materials. Therefore, a charge carriers transfer process between the LSMO and the YBCO layers through interface area leads to the breaking processes of the paired charge carriers and to the suppression of the SC order parameter in close proximity to the ferromagnetic film [1][2][3]. Depression of the critical parameters will be stronger for structures with thinner YBCO component.…”

“…High temperature SC Y 1 Ba 2 Cu 3 O 7−δ (YBCO) and FM manganite La 0.7 Sr 0.3 MnO 3 (LSMO) or La 0.7 Sr 0.3 MnO 3 (LCMO) materials are highly suitable for the preparation of SC/FM structures because of their similar growth conditions and the good matching of their crystalline parameters [1][2][3].…”

“…There are two basic mechanisms responsible for the interaction of the SC and FM components of the SC/FM structures: the electromagnetic mechanism (interaction of charge carriers of SC with the field induced by magnetic moments in FM) and interaction of spin-ordered electrons of FM with the charge carriers of SC (when the charge carriers penetrate into neighboring media through SC/FM interface) [1][2][3]8].…”

Superconducting and normal-state interlayer exchange coupling inLa0.67Sr0.33MnO3−YSenapati1, Budhani2 2005Phys. Rev. B360350View full textAdd to dashboardCite

“…Reported measurements on high T c superconductor (HTSC)-manganite heterostructures have primarily focused on the suppression of T c 12,13,14 , spin injection 15,16,17 and the effects on magnetoresistance 18,19 . Recently, the aspect of exchange coupling across HTSC layers has been addressed by Przyslupski et al 20 using (La 0.67 Sr 0.33 MnO 3 ) n /(YBa 2 Cu 3 O 7 ) m multilayers where n = 16 unit cells, and m varies from 1 to 8 unit cells. Measurements of field-cooled (FC) and zero-field-cooled (ZFC) magnetization loops in these samples reveal exchange biasing effects, which have been argued to be an indicator of interlayer exchange coupling.…”