论文标题
Nitio3的磁相图和磁弹性耦合
Magnetic phase diagram and magneto-elastic coupling of NiTiO3
论文作者
论文摘要
我们报告了通过光浮动区技术生长的NITIO3高质量单晶的高分辨率扩张法。各向异性磁相图是由热膨胀和磁性研究构建的，最高为B = 15T，以及静态（15T）和脉冲（60T）磁场中的磁化研究。我们的数据允许定量研究磁弹性耦合并确定单轴压力依赖性。虽然发现熵变化具有磁性，但格鲁尼森分析意味着在整个低温方向上只有一个相关的能量尺度。因此，我们的数据表明，观察到的由于磁弹性耦合和先前报道的磁二电气耦合而引起的结构变化[1]由相同的$磁性$磁性自由度驱动，该自由度在Nitio3中导致远距离磁性，这又在这种化合物中建立了线性磁性磁耦合。
We report high-resolution dilatometry on high-quality single crystals of NiTiO3 grown by means of the optical floating-zone technique. The anisotropic magnetic phase diagram is constructed from thermal expansion and magnetostriction studies up to B=15T and magnetization studies in static (15T) and pulsed (60T) magnetic fields. Our data allow to quantitatively study magneto-elastic coupling and to determine uniaxial pressure dependencies. While the entropy changes are found to be of magnetic nature, Grüneisen analysis implies only one relevant energy scale in the whole low-temperature regime. Thereby, our data suggest that the observed structural changes due to magneto-elastic coupling and previously reported magnetodielectric coupling[1] are driven by the same $magnetic$ degrees of freedom that lead to long-range magnetic order in NiTiO3, which in turn, establishes a linear magnetodielectric coupling in this compound.
