Recent publications

1. Neha Kanaujiya, Nagesh Kumar, A.K. Srivastava, Yogesh Sharma, G.D. Varma*, One-step synthesized mesoporous MnO₂@MoS₂ nanocomposite for high performance energy storage devices, Journal of Electroanalytical Chemistry 824 (2018)226.

2.  N. Kanaujiya, N. Kumar, Y. Sharma and G. D. Varma*, Probing the Electrochemical Properties of Flower Like Mesoporous MoS₂ in Different Aqueous Electrolytes, Journal of Electronic Materials 48 (2019) 904.

3. Jyoti and G. D. Varma*, Synthesis of CuO-ZnO/rGO ternary composites for superior         NO₂ gas sensor at room temperature, Materials Research Express 3 (2019) 035011.

4. R. Kumar, A. Mitra and G. D. Varma*, Study of vortex glass-liquid transition in           superconducting Fe(Te,Se) thin films on LaAlO₃ substrates, Journal of Applied Physics           125(2019) 193902.

5. R. Kumar, A. Mitra and G. D. Varma*, Vortex state study of superconducting Fe(Te, Se) thin films deposited on SrTiO₃ substrate by pulsed laser deposition technique, AIP Advances 9 (2019) 125128.

6. R. Kumar and G. D. Varma*, Effect of Co Doping on the Superconducting Properties of       Polycrystalline Fe_1.01-xCo_xTe_0.52Se_0.48, Journal of Superconductivity and Novel  Magnetism 32 (2019)3715.

7. Jyoti and G. D. Varma*, “Enhanced room temperature sensitivity of Ag-CuO          nanobrick/reduced graphene oxide composite for NO₂” J. Alloys and Compounds 806 (2019) 1469.

8. S. Kumari, S. Chauhan, D. S. Raghav, P. K. Siwach, G. D. Varma and H. K. Singh,     Suppression of Spin Glass Behavior in Phase Separated La_0.22Pr_0.40Ca_0.38MnO₃ by     Nanostructuring, IEEE Transaction on Magnetics 55 (2019) 8902288.

9. Jyoti and G. D. Varma*, Morphology-dependent room temperature NO₂ detection of         CuO nanostructure/rGO composites, Applied Physics A: Materials Science and Processing 126(2020)143.

10.  D. S. Raghav, S. Kumari, H. K. Singh and G. D. Varma*, “Structure, magnetism and         electrical transport of sol-gel derived La_0.30Pr_0.30Ca_0.40MnO₃: Elucidating consequences of size effect”, J. Magnetism and Magnetic Materials 497 (2020) 66003.

11.  R. Kumar and G. D. Varma*, Study of TAFF and vortex phase of Fe_xTe_0.60Se_0.40 (0.970≤x≤1.030) single crystals, Phys. Scr. 95(2020) 045814.

12.  R. Kumar and G. D. Varma*, Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals, Physica Status Solidi b 257 (2020)1900552.

13.  D. S. Raghav, S. Chauhan, H. K. Singh and G. D. Varma*, Competing magnetic and charge orders in La_0.60-xPr_xCa_0.40MnO₃ (x = 0.30, 0.35, 0.40, 0.45) polycrystals: consequences on  magnetism and electrical transport, Applied Physics A: Materials Science and Processing 127(2021) 43.

14. D. S. Raghav, S. Chauhan, H. K. Singh and G. D. Varma*, Structure, magnetism and electrical transport in La_1-x-yPr_yCa_xMnO₃ (y = 0.30, 0.35, 0.40; x = 0.40): Consequences of the interplay between intrinsic ionic radius and extrinsic particle size, Materials Chemistry and Physics 258 (2021)123900.

15. N. Kanaujia, N. Kumar, M. Singh, Y. K. Sharma and G. D. varma*, CoMn₂O4 Nanoparticles Decorated on 2D MoS₂ Frame: A Synergetic Energy Storage Composite Material for Practical Supercapacitor Application, Journal of Energy Storage 35 (2021) 102302.

16.  D. S. Raghav, S. Kumari, H. K. Singh, P. K. Siwach and G. D. Varma*, Evolution of the  magnetic and charge orders in La_0.15Pr_0.45Ca_0.40MnO₃: Assessing the role of particle size and  magnetic field, J. Magnetism and Magnetic Materials 536 (2021)168126.

17. Atul Kumar, Anil Kumar* and G. D. Varma*, Ultrafast resistive-type γ-Fe₂O₃–rGO nanohybrid-based humidity sensor – a respiratory monitoring tool, Journal of Materials Chemistry C 9(2021)8002.

18. R. Kumar, P. S. Shukla, G. D. Varma and M. Bag, Synthesis of porous electrode from                   CH₃NH₃PbBr₃ single crystal for efficient supercapacitor application: Role of morphology on the charge storage and stability, Electrochimica Acta 398(2021)139344.

19. Himanshu Chauhan, Rohit Kumar and G. D. Varma*, Study of anisotropy in the superconducting properties of FeTe_0.55Se_0.45 single crystal grown by the self-flux method, Superconductor Science and Technology 35 (2022)045003.

20. Ramesh Kumar, Ankush Kumar, Prem Sagar Shukla, G. D. Varma, D. Venkataraman and Monojit Bag, Photo rechargeable Hybrid Halide Perovskite Supercapacitors, ACS Applied Materials and Interfaces 14 (2022)35592.

21. Prem Sagar Shukla, Anant Agrawal, Anurag Gaur and G.D. Varma*, Facile synthesis of mesoporous MnCo₂O₄@MoS₂ nanocomposites for asymmetric supercapacitor application with  excellent prolonged cycling stability, Journal of Energy Storage 59(2023) 106580.

22. D. S. Raghav, K. D. Dayas, H. K. Singh and G. D. Varma*, Consequences of Particle Size and Magnetic Field on Magnetism and Electrical Transport in Nd_0.50Ca_0.50MnO₃, Journal of Superconductivity and Novel Magnetism  36 (2023)745.

23. Atul Kumar, Anil Kumar and G. D. Varma, Flexible humidity-tolerant γ-Fe₂O₃-rGO-based nanohybrids for energy efficient selective NO₂ gas sensing, New Journal of Chemistry 47 (2023) 4871.

24. Anshika Verma, Naina Narang, Dharnendra Singh and G. D. Varma, An experiment with electronic waste for improving the performance of FSSs embedded multilayer microwave absorber, Journal of Materials Science: Materials in Electronics 34 ( 2023)737.

25. Himanshu Chauhan, Shivam Kumar Miglani, A. Mitra and G. D. Varma*, Effect of thickness on the superconducting properties of the thin films of FeTe_0.55Se_0.45 deposited on YSZ substrates using Pulsed laser deposition (PLD) technique, Physica Scripta 98 (2023) 065934.

26. Prem Sagar Shukla, Anant Agrawal, Anurag Gaur and G. D. Varma*, Synthesis of mesoporous Zn-doped MnCo₂O₄ nanoparticles for high-energy density solid-state asymmetric supercapacitor, Journal of Energy Storage 7320 (2023)109229.

27. Himanshu Chauhan and G. D. Varma*, Effects of gamma-irradiation on the superconducting properties of FeTe_0.55Se_0.45 single crystals grown by self-flux method,  Journal of Applied Physics 135 (2024) 013901.

28. Shivam Kumar Miglani, Himanshu Chauhan and G. D. Varma*, Investigation on Magnetotransport Properties and Specific Heat Capacity of FeTe_0.58Se_0.42 Single Crystals Grown by Self-Flux Method, Physica Status Solidi (A): Applications and Materials Science 221(2024) 2300620.

29. Deepak Verma, Tulika Maitra and G. D. Varma*, Field induced metamagnetic transition and mixed charge transfer Mott-Hubbard character in nanocrystalline FeCo₂O₄ spinel oxide: A combined study using experimental and first principles techniques, Journal of Alloys and Compounds  9765 (2024)173216.

30. Himanshu Chauhan, Rohit Kumar, A. Sagdeo and G. D. Varma*, The effect of ‘Fe’ composition on the electronic structure and anisotropic magnetic properties of Fe_xTe_0.60Se_0.40 single crystals, Physica B: Condensed Matter 67715 (2024) 415697.

31. Anshika Verma, Shailza Gotra, Dharmendra Singh and G. D. Varma, Translating Electronic Waste Materials into Microwave Absorbing Materials: A Critical Analysis, Journal of Electronic Materials 53 (2024)5580.

32. Shivam Kumar Miglani and G. D. Varma*, Enhancement of superconducting properties of grown FeTe_0.65Se_0.35single crystals through air annealing, Physica Scripta 99 (2024)125928.

33. Shivam Kumar Miglani and G. D. Varma*, Vortex Phase Diagram and Pinning Mechanisms of Air-Annealed FeTe_0.8S_0.2 Single Crystals, Phys. Status Solidi B 262 (2025) 2400434, DOI: 10.1002/pssb.202400434

34. Dinesh Yadav, Prem Sagar Shukla and G. D. Varma*, Synthesis of rGO-CuO/ZnO nanocomposites for humidity tolerant room temperature NO₂ gas sensor, Applied Physics A: Materials Science and Processing 130 (2024) 713.

35. Deepak Verma, Tulika Maitra and G. D. Varma*, Unveiling the impact of Ni doping on the structural, electronic, and magnetic properties of nanocrystalline FeCo₂O₄ spinel oxide: a combined experimental and ab initio investigations, Journal of physics: Condensed matter 37(2025) 085802.

36. Prem Sagar Shukla, Anant Agrawal, Ashavani Kumar, Anurag Gaur and G. D. Varma*, Fabrication of MnCo₂O₄@PANI nanocomposites as electrode material for high-energy density asymmetric supercapacitor, Journal of Energy Storage 105(2025) 114782.

37. Anant Agrawal, Prem Sagar Shukla, G. D. Varma, Anurag Gaur and Ashavani Kumar, In-situ conversion of waste biomass into heteroatoms (N, O)-doped 3D porous carbon for colossally efficient electric double-layer capacitor, Journal of Energy Storage 109 (2025) 115095.

38. Akash Patel, Prem Sagar Shukla, Prabhakar Singh and G. D. Varma*, Synthesis and multifunctional applications of ZnO‑rGO composite in gas sensor and supercapacitor, J Mater Sci: Mater Electron 36 (2025) 239.

39. Deepak Verma, Tulika Maitra, V. K. Malik and G. D. Varma, Understanding the role of multi-component elements on the magnetic and magnetocaloric properties of (Mg_0.2Mn_0.2Co_0.2Ni_0.2Cu_0.2)Fe₂O₄ high entropy spinel oxide, Journal of Magnetism and Magnetic Materials 623 (2025) 173033.

40. Subhransu Kumar Panda and G. D. Varma, Improved flux pinning properties of Graphene Oxide blended La_1.85Sr_0.15CuO₄ (LSCO) superconductor, Physica B: Condensed Matter 707 (2025) 417188.