论文标题
交换偏见$ $ _ {2} $ nimno $ _ {6} $/batio $ _ {3} $ ferromagnetic-diamagnetic异质结构薄膜
Exchange bias in Sm$ _{2} $NiMnO$ _{6}$/BaTiO$ _{3}$ ferromagnetic-diamagnetic heterostructure thin films
论文作者
论文摘要
通常报道了铁磁（FM）/抗铁磁（AFM）双层系统的交换偏差（EB）偏移。虽然已知的Sm $ _ {2} $ nimno $ _ {6} $（snmo）和Batio $ _ {3} $（BTO）分别具有FM和DiaMagnetic Orderings，但在这里我们已经证明了冷却场依赖性EB和训练效果（Snmo/bto/bto snmo（sbto/bto snmo）。偏振拉曼光谱和磁化测定研究揭示了在SNMO层中有序晶格的背景中存在抗位于阳离子障碍，该层引入了NI-O-NI或MN-O-MN局部AFM相互作用，远距离Ni-O-O-MN FM有序宿主矩阵。我们还提出了对SNMO系统中阳离子障碍程度的增长方向操纵。与X射线吸收测量值相关，与配置相互作用模拟完全结合，表明从Ni/Mn 3 \ TextIt {d}到Ti 3 \ Ti 3 \ textit {d}轨道通过O 2 \ textit {p}轨道孔的电荷转移，跨snmo/bto（sb）接口，可以在bto（sb）内部跨度跨度跨度。考虑到在SB（或BTO/SNMO）三明治界面上交换耦合引起的矩固定的矩固定，讨论了SBS异质结构中观察到的交换偏差。
Exchange bias (EB) shifts are commonly reported for the ferromagnetic (FM)/antiferromagnetic (AFM) bilayer systems. While stoichiometric ordered Sm$_{2}$NiMnO$_{6}$ (SNMO) and BaTiO$_{3}$ (BTO) are known to possesses FM and diamagnetic orderings respectively, here we have demonstrated the cooling field dependent EB and training effects in epitaxial SNMO/BTO/SNMO (SBS) heterostructure thin films. The polarized Raman spectroscopy and magnetometric studies reveal the presence of anti-site cation disorders in background of ordered lattice in SNMO layers, which introduces Ni-O-Ni or Mn-O-Mn local AFM interactions in long range Ni-O-Mn FM ordered host matrix. We have also presented growth direction manipulation of the degree of cation disorders in the SNMO system. Polarization dependent X-ray absorption measurements, duly combined with configuration interaction simulations suggest charge transfer from Ni/Mn 3\textit{d} to Ti 3\textit{d} orbitals through O 2\textit{p} orbitals across the SNMO/BTO (SB) interfaces, which can induce magnetism in the BTO spacer layer. The observed exchange bias in SBS heterostructures is discussed considering the pinning of moments due to exchange coupling at SB (or BTO/SNMO) sandwich interface.
