Influence of Ni–Cr substitution on structural, magnetic, and optical properties of nanoferrites. - Beniwal, Ravikant; Anchal; Choudhary, Shobha Ram; Yadav, Pooja; Choudhary, Yashpal; Rundla, Avinash; Singh, Kedar; Alvi, P. A.; Choudhary, B. L. (Materials Research Innovations, 2026)