Physical, magnetic, morphological, and optical properties of isotropic magnetorheological elastomers with cobalt as fillers for assistive sensor devices applications by Nasruldin, Akmal Arif, Shabdin, Muhammad Kashfi, Awang Kechik, Mohd. Mustafa, Chen, Soo Kien, Lim, Kean Pah, Shaari, Abdul Halim, Abdul Karim, Muhammad Khalis, Nazmi, Nurhazimah, Miryala, Muralidhar