Interfacial spin-glass-like state and exchange bias in epitaxial iridate-manganite heterostructure

Interfacial spin-glass-like state and exchange bias in epitaxial iridate-manganite heterostructure
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外延铱酸盐-锰酸盐异质结构中的界面自旋玻璃态和交换偏压

DOI:
10.1016/j.jallcom.2019.03.018
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发表时间:
2019-06
影响因子:
6.2
通讯作者:
He Hongtao
He Hongtao
中科院分区:
材料科学2区
文献类型:
--
作者:
Yu Tao;Liu Qiying;Chen Pingbo;Zhou Liang;Li Hui;Ning Xingkun;Qiu Chunyin;He Hongtao

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过渡金属氧化物异质结构中的界面工程不仅引起奇异的物理现象,而且在自旋电子学中具有潜在的应用前景。在这项研究中,我们证明了在5顺磁性sriro3和3d铁磁性la0.67 sr0.33 mno3双层中出现了强界面耦合,其表现为矫顽力的显著增强,比单一la0.67 sr0.33 mno3层的矫顽力提高了约70倍,并且观察到高达40 K的意想不到的交换偏置效应。系统的磁分析进一步揭示了该5d- 3氧化物双分子层中界面自旋玻璃态的出现。这种界面耦合诱导的自旋玻璃态是在顺磁/铁磁异质结构中很少观察到的非常规交换偏置效应的潜在起源。
Interface engineering in transition metal oxide heterostructures not only gives rise to exotic physical phenomena, but also has potential applications in spintronics. In this study, we demonstrate the appearance of strong interfacial coupling in 5dparamagnetic SrIrO3and 3dferromagnetic La0.67Sr0.33MnO3bilayers, which manifests itself in the dramatic enhancement of coercivity by about 70 times larger than that of the single La0.67Sr0.33MnO3layer and the observation of an unexpected exchange bias effect up to 40 K. Systematic magnetic analysis further reveals the emergence of an interfacial spin glass state in this 5d-3doxide bilayer. This interfacial-coupling-induced spin glass state is the underlying origin of the unconventional exchange bias effect rarely observed in paramagnetic/ferromagnetic heterostructures.
DOI: 10.1126/sciadv.1600304
发表时间: 2016-07
期刊: Science advances
影响因子: 13.6
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