论文标题
反式疾病对GD取代y $ _2 $ comno $ _6 $ double double perovskite的磁性和交换偏见特性的影响
The effect of antisite disorder on magnetic and exchange bias properties of Gd-substituted Y$_2$CoMnO$_6$ double perovskite
论文作者
论文摘要
结合了实验研究和第一原理DFT计算，我们报告了GD取代的y $ _2 $ comno $ _6 $ double Perovskite的物理和磁性特性，这些plouble perovskite受到反固定 - disorder-disorder-disorder-disorder-disorder-derion-derion-derion-derion驱动式旋转旋转构型的强烈影响。在GD掺杂上，CO和MN离子以混合价值（Co $^{3+} $，CO $^{2+} $，Mn $^{3+} $和Mn $^{4+} $）状态。已经观察到多次磁性转换：i）发现在\ textit {t} $ _ c $ = 95.5 k，ii）以\ textit {t} $ _ n $ = 47 k的驱动的反铁磁过渡的情况下，在\ textit {t} $ _ c $ = 95.5 k，ii）中发现了多个磁性转换： \ textIt {t} $ \ leq $ 20 K，主要源自GD订购，如我们的DFT计算所揭示。 AC敏感性测量证实了该材料中没有任何自旋玻璃或簇玻璃相。由于FM和Antisite-Disorder创建的FM和AFM簇的接口，发现大量大的交换偏置效应（\ textit {h} $ _ {eb} $ = 1.07 KOE）在47 K以下发生。
Combining experimental investigations and first-principles DFT calculations, we report physical and magnetic properties of Gd-substituted Y$_2$CoMnO$_6$ double perovskite, which are strongly influenced by antisite-disorder-driven spin configurations. On Gd doping, Co and Mn ions are present in mixed-valence (Co$^{3+}$, Co$^{2+}$, Mn$^{3+}$ and Mn$^{4+}$) states. Multiple magnetic transitions have been observed: i) paramagnetic to ferromagnetic transition is found to occur at \textit{T}$_C$=95.5 K, ii) antiferromagnetic transition at \textit{T}$_N$=47 K is driven by $3d-4f$ polarisation and antisite disorder present in the sample, iii) change in magnetization below \textit{T}$\leq$20 K, primarily originating from Gd ordering, as revealed from our DFT calculations. AC susceptibility measurement confirms the absence of any spin-glass or cluster-glass phases in this material. A significantly large exchange bias effect (\textit{H}$_{EB}$=1.07 kOe) is found to occur below 47 K due to interfaces of FM and AFM clusters created by antisite-disorder.
