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Growth of [110] La2/3Sr1/3MnO3YBa2Cu3O7 heterostructures

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6 Author(s)
Mandal, Soumen ; Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, India ; Bose, Saurabh K. ; Sharma, Rajeev ; Budhani, R.C.
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YBa2Cu3O7La2/3Sr1/3MnO3 heterostructures of [110] orientation are grown to allow direct injection of spin polarized holes from the La2/3Sr1/3MnO3 into the CuO2 superconducting planes. The magnetic response of the structure at T≪Tsc shows both diamagnetic and ferromagnetic moments with [001] direction as magnetic easy axis. While the superconducting transition temperature (Tsc) of these structures is sharp (ΔTsc≃2.5 K), the critical current density (Jc) follows a dependence of the type Jc=Jo(1-T/Tsc)3/2 with highly suppressed Jo(≃2×104 A/cm2), indicating strong pair breaking effects of the ferromagnetic boundary.

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Applied Physics Letters  (Volume:89 ,  Issue: 18 )