Berlin 2024 – scientific programme

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DS: Fachverband Dünne Schichten

DS 8: Thin Film Properties II

DS 8.3: Talk

Wednesday, March 20, 2024, 10:00–10:15, A 060

Structural and magnetic anisotropy in YBa2Cu3O7/ La0.67Sr0.33MnO3 bilayer film on SrTiO3 substrate — •Ankita Singh, Sawani Datta, Ram Prakash Pandeya, Srinivas C. Kandukuri, and Kalobaran Maiti — Department of Condensed Matter Physics & Material Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India

We study the magnetic properties and emergence of superconductivity in YBa2Cu3O7 (YBCO)/ La0.67Sr0.33MnO3 (LSMO) heterostructures. Bilayer films of superconducting layer, YBCO and ferromagnetic layer, LSMO were grown on SrTiO3 (STO) (001) substrate using a home built ultrahigh vacuum (UHV) pulsed laser deposition (PLD) system. Magnetization data at 100 K as a function of applied field shows ferromagnetic behaviour due to the LSMO layer. Cooling below 100 K leads to superconductivity in this material; the onset of superconductivity occurs at a temperature TC(onset) of 86 K for Hext*c (in-plane) and Hext || c (out-of-plane) under 100 Oe applied field. In-plane magnetic measurements show significant suppression of diamagnetic behaviour as compared to the out-of-plane measurements. The susceptibility signals are higher for the out-of-plane direction. Such strong anisotropy in magnetism below the transition temperature reveal complex interplay of magnetism and superconductivity in this system and calls for further study in this direction.

Keywords: Thin Film Deposition; Pulsed Laser Deposition; Magnetism; XRD; XPS