论文标题
一项关于两系列双钙钛矿的磁性和场诱导磁过渡的比较研究RE2BIRO6（re = pr，nd，sm，sm，eu，gd b = zn，mg）
A comparative study on magnetic order and field induced magnetic transition on two series of double perovskite iridates RE2BIrO6 (RE=Pr,Nd,Sm,Eu,Gd B=Zn,Mg)
论文作者
论文摘要
我们对两个基于稀土（RE）的双重钙蛋白酶触发re2biro6（re = pr，nd，sm-gd; b = zn，mg）进行了比较磁研究，该磁性磁含量从〜330 meV到〜560 MEV。对于非磁性RE = EU阳离子，EU2MGIRO6显示出低于Néel温度（TN）以下的抗铁磁（AFM）和野外诱导的自旋 - 触发器过渡，而不是铁磁（FM）的类似EU2ZNIRO6的行为。对于含磁弹力的RE离子，GD2BIRO6分别显示出与FM样过渡（B = Zn）和AFM阶（B = mg）的对比磁性行为。而对于re = pr，nd和sm ions，所有成员在tn下方均显示AFM基态和野外诱导的自旋流动过渡，而与b = Zn或mg阳离子无关。此外，在高场中的RE2ZNIRO6（re = pr，nd）中观察到两个连续的场诱导的元磁转变，最高为56 t，构建了所得的场温度（H-T）相图。 RE2BIRO6中的各种磁性行为表明，RE和IR Sublattices之间的4F-IR交换相互作用可以介导其磁性。
We perform a comparative magnetic study on two series of rare-earth (RE) based double perovskite iridates RE2BIrO6 (RE=Pr,Nd,Sm-Gd;B=Zn,Mg), which show Mott insulating state with tunable charge energy gap from ~330 meV to ~560 meV by changing RE cations. For nonmagnetic RE=Eu cations, Eu2MgIrO6 shows antiferromagnetic (AFM) order and field-induced spin-flop transitions below Néel temperature (TN) in comparison with the ferromagnetic (FM)-like behaviors of Eu2ZnIrO6 at low temperatures. For magnetic-moment-containing RE ions, Gd2BIrO6 show contrasting magnetic behaviors with FM-like transition (B=Zn) and AFM order (B=Mg), respectively. While, for RE=Pr, Nd and Sm ions, all members show AFM ground state and field-induced spin-flop transitions below TN irrespective of B=Zn or Mg cations. Moreover, two successive field-induced metamagnetic transitions are observed for RE2ZnIrO6 (RE=Pr,Nd) in high field up to 56 T, the resultant field temperature (H-T) phase diagrams are constructed. The diverse magnetic behaviors in RE2BIrO6 reveal that the 4f-Ir exchange interactions between the RE and Ir sublattices can mediate their magnetism.
