论文标题
磁性，热和磁平的特性，带有多型相
Magnetic, thermal, and magnetocaloric properties of the holmium trialuminide HoAl$_{3}$ with polytypic phases
论文作者
论文摘要
我们研究了具有两个不同晶体结构的金属间hoal $ _ {3} $化合物的磁性，热和磁化性能。室温平衡三角阶段$ _ {3} $在Neel温度下进行反铁磁性（AFM）过渡$ t^{\ rm tri} _ {\ rm n} _ {\ rm n} = $ 9.8 k。 0-50 KOE。通过快速固化过程制备的高压立方相HOAL3在$ t^{\ rm cub} _ {\ rm n} = $ 15 k = $ 15 k的低于fiferromagnet上。 f} = $ 11K。磁态的连续变化导致MCE在低温下的温度和场依赖性。
We investigate the magnetic, thermal, and magnetocaloric properties of the intermetallic HoAl$_{3}$ compounds with two different crystal structures. The room-temperature equilibrium trigonal phase HoAl$_{3}$ undergoes an antiferromagnetic (AFM) transition at the Neel temperature $T^{\rm tri}_{\rm N} =$ 9.8 K. The AFM ordering of the compound is strong against the magnetic field, so that inverse magnetocaloric effect (MCE) is found even under a magnetic field change of 0-50 kOe. The high-pressure cubic phase HoAl3, prepared by a rapid-solidification process, is antiferromagnetically ordered below $T^{\rm cub}_{\rm N} =$ 15 K. Magnetic and specific heat measurements reveal that this long-range AFM state becomes unstable as the temperature drops and then it is replaced by a magnetic glassy state below a spin freezing temperature $T_{\rm f} =$ 11 K. The successive changes in magnetic state result in complicated temperature and field dependence of the MCE at low temperatures.
