Joint effect of ferromagnetic and non-ferromagnetic cations for adjusting room temperature ferromagnetism of highly luminescent CuNiInS quaternary nanocrystals
Joint effect of ferromagnetic and non-ferromagnetic cations for adjusting room temperature ferromagnetism of highly luminescent CuNiInS quaternary nanocrystals
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铁磁和非铁磁阳离子的联合效应调节高发光CuNiInS四元纳米晶的室温铁磁性
DOI：
10.1088/1361-6528/28/3/035601
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发表时间：
2017-01-20
期刊：
影响因子：
3.5
通讯作者：
Cui, Yiping
中科院分区：
文献类型：
--
作者：
Shen, Jin;Wang, Chunlei;Cui, Yiping
在这项工作中，高度发光的四元CuNiInS纳米晶体（NC）被提出作为一个很好的原型调查缺陷诱导的室温铁磁性。铁磁性Ni阳离子可以保持NCs的强发光，而不会在禁带中心引入中间能级。强发光的NC被用来作为一个指标，用于监测其内部的空位缺陷的浓度，促进CuNiInS NC的室温铁磁性的起源的调查。结果表明，Cu空位（V-Cu（-））被Ni取代后，产生了由V-Cu（-）和Ni取代Cu（Ni-Cu（+））组成的束缚磁极化子，从而产生了CuNiInS纳米晶的室温铁磁性.无论是铁磁性的Ni离子还是非铁磁性的Cu离子，都可以通过改变V-Cu（-）和Ni-Cu（+）的浓度比来改变束缚磁极化子的浓度，从而对CuNiInS纳米晶的磁性进行调谐。
In this work, highly luminescent quaternary CuNiInS nanocrystals (NCs) are put forward as a good prototype for investigating defect-induced room temperature ferromagnetism. A ferromagnetic Ni cation can preserve the strong luminescence of NCs without introducing intermediate energy levels in the center of the forbidden band. The strong luminescence of NCs is used as an indicator for monitoring the concentration of vacancy defects inside them, facilitating the investigation of the origin of room temperature ferromagnetism in CuNiInS NCs. Our results reveal that the patching of Cu vacancies (V-Cu(-)) with Ni will result in bound magnetic polarons composed of both V-Cu(-) and a substitution of Cu by Ni (Ni-Cu(+)), giving rise to the room temperature ferromagnetism of CuNiInS NCs. Either the ferromagnetic Ni or the non-ferromagnetic Cu cation can tune the magnetism of CuNiInS NCs because of the change of bound magnetic polaron concentration at the altered concentration ratio of V-Cu(-) and Ni-Cu(+).