First-order ferromagnetic transition of quantum spin ice system Yb2Ti2O7
First-order ferromagnetic transition of quantum spin ice system Yb2Ti2O7
复制标题
量子自旋冰系Yb2Ti2O7的一阶铁磁转变
DOI：
10.1142/s2010324715400020
复制
发表时间：
2015
期刊：
影响因子：
1.8
通讯作者：
T. Sakakibara
中科院分区：
文献类型：
--
作者：
Y. Yasui;N. Hamachi;Y. Kono;S. Kittaka;T. Sakakibara
对量子自旋冰系统Yb_2Ti_2O_7单晶进行了中子衍射、比热和磁化强度的测量。磁化强度和中子衍射强度随温度变化的热滞回线显示了一级铁磁转变，证实了所用单晶在TC = 0.2K时比热（C）-温度（T）曲线上具有尖锐的峰结构。中子衍射结果的磁结构分析表明，Yb 3+的磁矩沿着[001]方向具有铁磁共线结构，在0.03 K时的有序磁矩值为1.1 ± 0.1 μ B。讨论了Yb_2Ti_2O_7的铁磁转变机制。
The neutron diffraction and measurements of specific heat and magnetization were carried out on single crystals of a quantum spin ice system Yb2Ti2O7. The thermal hysteresis loops of temperature dependence of the magnetization and neutron diffraction intensity indicate a first-order ferromagnetic transition, where the used single crystals are confirmed to have a sharp peak structure in the specific heat (C)–temperature (T) curve at TC∼ 0.2 K. The magnetic structure analysis of neutron diffraction results revealed that the Yb3+moments have a ferromagnetic collinear structure along [001] directions with ordered moment value 1.1 ± 0.1 μBat 0.03 K. The mechanism of ferromagnetic transition of Yb2Ti2O7will be discussed.