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Structural and magnetic anisotropy in YBa2Cu3O7/La0.67Sr0.33MnO3 bilayer on SrTiO3 substrate
by Ankita Singh, Ram Prakash Pandeya, Sawani Dutta, Srinivas C. Kandukuri and Kalobaran Maiti
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Submission summary
| Authors (as registered SciPost users): | Ankita Singh |
| Submission information | |
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| Preprint Link: | scipost_202207_00021v1 (pdf) |
| Date submitted: | 2022-07-15 08:42 |
| Submitted by: | Singh, Ankita |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | International Conference on Strongly Correlated Electron Systems (SCES2022) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
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 ultrahigh vacuum Pulsed Laser Deposition system. Magnetization data at 100 K as a function of applied magnetic 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\perp c (in-plane) & 84 K for 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 out-of-plane direction. Such strong anisotropy in magnetism and the transition temperatures reveal complex interplay of magnetism and superconductivity in this system and calls for further study in this direction.
Current status:
Reports on this Submission
Anonymous Report 1 on 2022-9-14 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202207_00021v1, delivered 2022-09-14, doi: 10.21468/SciPost.Report.5694
Strengths
1. Excellent sample quality, which is always tricky to achieve considering retaining single crystalline phase across the heterostructure is always a challenge.
2. Results from X-ray diffraction studies is clear and definitive.
3. Clear representation of the results presented.
Weaknesses
1. Major criticism is the magnetic anisotropy interpretation. It is based on change of the Tc value from H perpendicular to in-plane with c-axis. This is estimated from magnetization studies. But the variation is within 2K (86K to 84K) and in most cases the error bar (deltaT) on exact estimation of Tc value from ZFC curves is comparable to the 2K range. So an inset of first-order derivative showing exact location of peak at Tc would be more convincing and add value to the manuscript.
2. A discussion on the effect of superconductivity on the magnetism is not addressed adequately. Few possible publications from Prof. C. Bernhard (pioneers in this field) discussing interplay of superconductivity and magnetism in these heterostructure can be used for discussions : Nature Materials 8, pages 315–319 (2009), Physical Review B 87, 115105 (2013), Physical Review B 100, 115129 (2019)
Report
Overall the manuscript reads well. With the recommendations suggested it is suitable for publication.
Requested changes
Mentioned within weakness section.
Author: Ankita Singh on 2022-10-04 [id 2877]
(in reply to Report 1 on 2022-09-14)First, we would like to thank the referee for careful analysis, detailed response, and positive attitude regarding our manuscript. His/her technical comments have helped us substantially to improve our manuscript. We have taken into account his/her comments in revising the manuscript.
We have added the first order derivative of susceptibility curve as inset in Fig.2, clearly showing the change in the Tc value with a difference of 2 K along both the direction of applied magnetic field.
We agree completely with the referee regarding the discussion about the effect of magnetism on superconductivity that was missing in our manuscript. We have added a paragraph on page no. 4 in our manuscript regarding the change in superconductivity/ferromagnetism in bilayer thin films due to the proximity effect.
We again thank the referee for these minor but important comment
Attachment:
Manuscript_revised_Q4QX1wD.pdf