VSM results of BaFe₁₂O₁₉@MnO₂ at various temperatures and holding times.

Temperature and holding time	M s (Tesla)	M r (Tesla)	H c (kA m−1)	BHmax (kJ m−2)
180 °C, 12 h	0.3207	0.1753	728.804	32.218
160 °C, 12 h	0.3432	0.1699	654.781	36.992
140 °C, 12 h	0.3562	0.1449	783.475	39.876
160 °C, 15 h	0.3425	0.2076	780.657	36.891
160 °C, 12 h	0.3432	0.1699	654.781	36.937
160 °C, 9 h	0.3514	0.2069	705.488	38.794