Lin Haibo, Ye Shanshan, Xiong Guozhu, Zhang Kailai, Su Yijing, Lu Kan, Deng Wen, Xu Shoulei, Xiong Dingkang
School of Physical Science and Technology, Guangxi University, 100 East Daxue Road, Nanning 530004, China.
State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures, Nanning 530004, China.
Materials (Basel). 2025 Apr 16;18(8):1827. doi: 10.3390/ma18081827.
Ceramic samples of CuCrYO (x = 0-0.02) were synthesized via the high temperature solid-state reaction method, and the influence of Y doping on their microstructure and antiferromagnetic phase transitions was systematically investigated. Y doping increased the unit cell volume from 130.928 Å for x = 0 to 131.147 Å for x = 0.0200, and the average grain size decreased from 3.38 μm for x = 0 to 4.27 μm for x = 0.0200. The Cr and Y elements maintained +3 valence, while the Cu element had +1 valence. All samples showed obvious paramagnetism when the temperature was higher than 140 K. When the temperature continued to decrease, the lattice expansion changed the bond length and bond angle of the Cr-O-Cr bond, resulting in a change in the superexchange interaction, and the magnetic susceptibility increased significantly, gradually showing antiferromagnetism. The T of the undoped sample was about 46 K, the T of the doped sample with x = 0.0175 was about 21 K, and the T of other doped samples was about 30 K. This result indicates that Y doping enhanced the antiferromagnetism of the sample but also weakened its antiferromagnetic stability.
采用高温固相反应法合成了CuCrYO（x = 0 - 0.02）陶瓷样品，并系统研究了Y掺杂对其微观结构和反铁磁相变的影响。Y掺杂使晶胞体积从x = 0时的130.928 Å增加到x = 0.0200时的131.147 Å，平均晶粒尺寸从x = 0时的3.38 μm减小到x = 0.0200时的4.27 μm。Cr和Y元素保持 +3价，而Cu元素为 +1价。当温度高于140 K时，所有样品均表现出明显的顺磁性。当温度继续降低时，晶格膨胀改变了Cr - O - Cr键的键长和键角，导致超交换相互作用发生变化，磁化率显著增加，逐渐呈现反铁磁性。未掺杂样品的T约为46 K，x = 0.0175的掺杂样品的T约为21 K，其他掺杂样品的T约为30 K。该结果表明，Y掺杂增强了样品的反铁磁性，但也削弱了其反铁磁稳定性。
