Pankrats A, Petrakovskii G, Kartashev A, Eremin E, Temerov V
Kirensky Institute of Physics, SB RAS, 660036 Krasnoyarsk, Russia.
J Phys Condens Matter. 2009 Oct 28;21(43):436001. doi: 10.1088/0953-8984/21/43/436001. Epub 2009 Oct 5.
We present the results of the magnetic and heat capacity study of a magnetic phase diagram of a HoFe(3)(BO(3))(4) single crystal. Two magnetic phase transitions are found in the low-temperature region. The transition from the paramagnetic to easy-plane antiferromagnetic state occurs at T(N) = 37.4 K and is independent of an applied magnetic field. The sharp heat capacity peaks and magnetization jumps corresponding to the spontaneous and field-induced spin-reorientation transitions between the easy-axis and easy-plane states are observed below 4.7 K. Also, the additional heat capacity peaks, which can be attributed to the Schottky anomalies with the field-dependent characteristic temperatures, are found. According to the magnetic and thermal measurement data, the magnetic phase diagrams of HoFe(3)(BO(3))(4) for the magnetic field parallel and perpendicular to the crystal axis are constructed.
我们展示了对HoFe(3)(BO(3))(4)单晶磁相图的磁性和热容量研究结果。在低温区域发现了两个磁相变。从顺磁到易面反铁磁态的转变发生在T(N) = 37.4 K，且与外加磁场无关。在4.7 K以下观察到了对应于易轴和易面态之间自发和场致自旋重取向转变的尖锐热容量峰和磁化跳跃。此外，还发现了可归因于具有场依赖特征温度的肖特基反常的额外热容量峰。根据磁性和热测量数据，构建了磁场平行和垂直于晶体轴时HoFe(3)(BO(3))(4)的磁相图。
