Research Publications: A Broad Perspective

The effects of competing interactions have been extensively explored in the well-known spin-chain system Ca₃Co₂O₆. A series of research articles based on high-quality single crystals has been published in reputed international journals. Using primarily magnetization measurements, these studies have revealed several intriguing phenomena, including dimensionality crossover, unconventional magnetic ground states, step-like magnetization, and strong Ising magnetism. Some of the representative publications are listed below. 

1) Santanu De*, Sayan Ghosh, Manoranjan Kumar, A. K. Yogi and A. Banerjee, Competition of Zeeman energy, antiferromagnetic inter-chain couplings and anisotropy energy in triangular-lattice ferrimagnet: Ca3Co2O6, Phys. Rev. B 113, 184416 (2026). doi.org/10.1103/fmhs-3rqw 

2) Santanu De*, B. Dutta, V. R. Reddy and A. Banerjee, Three-dimensional ferrimagnetic ground state of triangular-lattice system: Ca3Co2O6, J. Magn. Magn. Mater. 624, 173000 (2025). doi.org/10.1016/j.jmmm.2025.173000 

3) Santanu De*, A. Chauhan, B. R. K. Nanda and A. Banerjee, Tuning the interplay of spin-orbit coupling and trigonal crystal-field effect in Ising-like spin system Ca3Co2O6, Phys. Rev. B 107, 014418 (2023). doi.org/10.1103/PhysRevB.107.014418 

4) Santanu De, and A. Banerjee*, Field-temperature induced dimensionality crossover in Ca3Co2O6 spin system, J. Magn. Magn. Mater. 539, 168349 (2021). doi.org/10.1016/j.jmmm.2021.168349 

5) Santanu De*, A. Banerjee, Strengthening of Ferromagnetic Intrachain Coupling by Ge Substitution in Quasi-One-Dimensional Spin Chain Compound: Ca3Co2O6, AIP Conf. Proc. 2369, 020053 (2021). doi.org/10.1063/5.0061949 

6) Santanu De* and A. Banerjee, Influence of cooling field on field induced magnetic states in Ca3Co2O6 compound, Physica B 572, 125 (2019). doi.org/10.1016/j.physb.2019.07.033 

7) Santanu De*, Kranti Kumar, A Banerjee, P Chaddah, Kinetic arrest of field-temperature induced first order phase transition in quasi-one dimensional spin system Ca3Co2O6, AIP Conf. Proc. 1731, 130026 (2016). doi.org/10.1063/1.4948132 

Remarkable Outcome: This series of systematic studies establishes a textbook-level example of an advanced spin-flipping transition governed by the cosine scaling of the entire magnetization dataset (Phys. Rev. B 113, 184416 (2026)). The work demonstrates how comprehensive, long-term investigations can uncover fundamental physical mechanisms and generate significant scientific insights. It also highlights that the true impact of research cannot always be measured solely by the journal quartile (Q1/Q2), as transformative discoveries often arise from sustained, rigorous, and curiosity-driven scientific exploration.