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The effect of Fe substitution on the magnetic behaviors of HoCrO3 nanofibers

Quanli Hu,Hanqiong Luo,Chao Song,Yin Wang,Jinghai Liu

HoCrO 3 displays fascinating magnetic characteristics. Owing to the co-presence of Ho 3+ and Cr 3+ ions, complex magnetic interactions are exhibited. A facile electrospinning as well as annealing way was utilized to make Fe-substituted HoCrO 3 nanofibers, which were HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 . The perovskite orthorhombic structures of HoCrO 3 , HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 were revealed by Rietveld refined XRD patterns. With the Fe substitution, the magnetic behaviors of HoCr 0.9 Fe 0.1 O 3 , HoCr 0.7 Fe 0.3 O 3 , and HoCr 0.5 Fe 0.5 O 3 NFs changed from canted antiferromagnetic at low temperature to paramagnetic at high temperature because of the combination of three kinds of magnetic contributions, namely Cr 3+ , Ho 3+ , and Fe 3+ . Fe substitution also enhanced the Cr 3+ ordering temperature from 139 to 161 K. This study should stimulate the development of holmium chromite nanomaterials for data storage devices and sensors.