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Magnetic and Structural Properties of MnBi<SUB>1-x</SUB>Ti<SUB>x</SUB> Alloys
Suyin Zhang,Pengyue Zhang,HuanChang Jiang,Yaojun Shi,Nengjun Yu,Hongliang Ge 한국자기학회 2014 Journal of Magnetics Vol.19 No.3
MnBi1-xTix (x = 0, 0.4, 0.7, 1) alloys were prepared by arc-melting, followed by heat treatment. X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) were used to measure and investigate the phase structure and magnetic properties. The temperature dependent magnetization curves indicate that the phase transitions between LTP and HTP MnBi occur with heating or cooling in MnBi1-xTix (x ≤ 0.7) samples. However, MnTi samples are in Mn₂Ti single-phase, with very low magnetic properties. Furthermore, the coercivity exhibits a positive temperature coefficient. The results show that the optimal content of Ti for the coercivity of MnBi1-xTix alloy is x = 0.4. For MnBi sample, the coercivity reaches a maximum value of 1.13 T at 550 K. However, the remanence and energy product show apparent decrease with the addition of Ti in MnBi1-xTix alloys.