The multiferroic properties of BiFe0.5Mn0.5O3 and BiFeO3/BiMnO3 superlattice films
The multiferroic properties of BiFe0.5Mn0.5O3 and BiFeO3/BiMnO3 superlattice films
复制标题
BiFe0.5Mn0.5O3和BiFeO3/BiMnO3超晶格薄膜的多铁性
DOI：
10.1063/1.4914965
复制
发表时间：
2015-05-07
影响因子：
3.2
通讯作者：
Du, Jun
中科院分区：
文献类型：
--
作者：
Xu, Qingyu;Sheng, Yan;Du, Jun
通过脉冲激光沉积在 (111) SrTiO3 衬底上外延生长 BiFe0.5Mn0.5O3 (BFMO) 和 BiFeO3/BiMnO3 超晶格 (BFO/BMO) 薄膜。 BFMO 和 BFO/BMO 的铁电性已通过压电响应力显微镜得到证实。两个样品均观察到弱铁磁性。 BFO/BMO的磁化强度小于BFMO，证实了反铁磁Fe3+-O2−-Mn3+相互作用。在低温下，BFMO 的 T1 = 235 K 和 T2 = 42 K，BFO/BMO 的 T1 = 198 K 和 T2 = 77 K，在温度相关磁化强度 (M-T) 曲线中观察到两个异常。两个样品的零场冷却 (ZFC) M-T 曲线中 T1 处的峰值可以通过 Fe3+-O2−-Mn3+ 相互作用的开始来理解。 BFMO 在 T2 处的峰值可以理解为由于 Mn 分布不均匀而导致铁磁性富 Mn 簇的阻塞。在场冷和 ZFC M-T 曲线中观察到的 BFO/BMO 在 T2 处的峰值归因于单离子磁晶各向异性的增强，这是由于...
BiFe0.5Mn0.5O3 (BFMO) and BiFeO3/BiMnO3 superlattice (BFO/BMO) films were epitaxially grown on (111) SrTiO3 substrates by pulsed laser deposition. The ferroelectricity of both BFMO and BFO/BMO has been confirmed by piezoresponse force microscopy. Weak ferromagnetism was observed for both samples. The magnetization of BFO/BMO is smaller than that of BFMO, confirming the antiferromagnetic Fe3+-O2−-Mn3+ interaction. Two anomalies at low temperature, T1 = 235 K and T2 = 42 K for BFMO and T1 = 198 K and T2 = 77 K for BFO/BMO, were observed in temperature dependent magnetization (M-T) curves. The peaks at T1 in zero field cooled (ZFC) M-T curves for both samples can be understood by the onset of Fe3+-O2−-Mn3+ interaction. The peak at T2 for BFMO can be understood by the blocking of ferromagnetic Mn-rich clusters due to the inhomogeneous distribution of Mn. The peak at T2 for BFO/BMO observed in both field cooled and ZFC M-T curves has been ascribed to the enhanced single-ion magnetocrystalline anisotropy due to...