Professor Ram Kripal is a distinguished physicist and senior researcher at the EPR Laboratory, Department of Physics, University of Allahabad, Prayagraj, India. He holds a Ph.D. in condensed-matter physics and has become a recognized expert in Electron Paramagnetic Resonance (EPR) spectroscopy, crystal-field theory, and optical absorption studies.

Over his extensive career, Prof. Kripal has authored and co-authored numerous peer-reviewed studies investigating the magnetic and optical properties of transition-metal–doped single crystals and nanomaterials. His recent collaborative publication, “Modeling of Cr³⁺‑doped Cassiterite (SnO₂) Single Crystals” (IgMin Res, June 28, 2024), analyzes zero‑field splitting and crystal-field parameters using the superposition model framework. Similarly, his methodological EPR investigations—such as those on Mn²⁺ and VO²⁺ centres in various host matrices—demonstrate his strong theoretical rigor and experimental precision.

A particular highlight of his work includes the 2010 study “Single crystal EPR, optical absorption and superposition model study of Cr³⁺‑doped ammonium dihydrogen phosphate” (Spectrochim Acta A, Jun 2010), where he and his team characterized multiple inequivalent chromium sites and elucidated bonding features using spin‑Hamiltonian and optical spectral data.

Beyond primary crystals, Prof. Kripal has contributed theoretical models to describe zero‑field splitting in nanostructured materials, like Mn²⁺‑doped zinc sulfide and cadmium phosphate, validating experimental results with superposition‑model calculations. His prolific collaboration with postgraduate researchers further showcases his mentorship role.

An ORCID‑identified scholar (0000‑0002‑3483‑8704), Prof. Kripal remains committed to advancing EPR spectroscopy applications in material science. His work continues to refine understanding of spin Hamiltonian parameters and their correlation with crystal structure, optical behavior, and magnetic symmetry in functional materials.

Professor Ram Kripal’s research focuses on the advanced characterization of transition-metal ions in crystalline and nanostructured materials using Electron Paramagnetic Resonance (EPR) spectroscopy, optical absorption, and crystal-field theory. He specializes in studying paramagnetic centers such as Cr³⁺, Mn²⁺, VO²⁺, and Cu²⁺ doped into various host lattices to evaluate their magnetic, optical, and structural properties. His work often involves detailed theoretical modeling using the superposition model and spin-Hamiltonian formalism to estimate zero-field splitting parameters, covalency, and bonding geometries. Prof. Kripal is also engaged in correlating experimental EPR data with electronic transitions and lattice distortions in single crystals and nanomaterials. His studies contribute to understanding the magneto-optical behavior of materials useful in lasers, phosphors, and quantum devices. He is particularly interested in the site symmetry, ligand field effects, and magnetic anisotropy of dopant ions, providing deep insights into the design and development of functional optical and magnetic materials.