【摘 要】
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MnBi compound is fabricated under a magnetic field of 1 T,and the c-axis of hexagonal MnBi crystal is aligned parallel to the magnetic field direction.The satur
【机 构】
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Department of Mathematics and Physics,Shanghai University of Electric Power,Shanghai 200090“,”Depart
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MnBi compound is fabricated under a magnetic field of 1 T,and the c-axis of hexagonal MnBi crystal is aligned parallel to the magnetic field direction.The saturation magnetization M8 decreases with the increase of temperature.At temperatures below 200K,the coercive tield Hc is about 150 Oe,while the coercive field Hc increases with temperature above 200K.From 200K to 300K,the remnant magnetization Mr and the Mr/Ms increase with the temperature.Below 200 K,Mr and Mr/Ms reach roughly a constant value.However,there is an abnormal increase at 100K in Hc,Mr and Mr/Ms,which comes from a spin-reorientation in MnBi.Magnetization results show the spin-reorientation for MnBi at about 91 K due to the variations of the anisotropy constants.
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