%0 Journal Article %T Effect of modulation amplitude on low-field microwave absorption in hafnium-doped Y-Ba-Cu-O %A A G Vedeshwar %A A V Narlikar %A H D Bist %A Md Shahabuddin %A Prem Chand %A S K Agarwal %J - %D 1991 %U https://www.ias.ac.in/describe/article/boms/014/03/0789-0792