Ferromagnetism in CuO-ZnO multilayers
Ferromagnetism in CuO-ZnO multilayers
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DOI：
10.1063/1.2959186
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发表时间：
2008-03
影响因子：
4
通讯作者：
C. Sudakar;K. R. Padmanabhan;R. Naik;G. Lawes;B. Kirby;Sanjiv Kumar;V. Naik
中科院分区：
文献类型：
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作者：
C. Sudakar;K. R. Padmanabhan;R. Naik;G. Lawes;B. Kirby;Sanjiv Kumar;V. Naik
我们研究了CuO-ZnO异质结的磁性，以阐明掺铜氧化锌铁磁特征的来源。CuO层厚度在15~150 nm之间变化，氧化锌层厚度在70~350 nm之间变化。卢瑟福背散射实验表明，无论是铜在氧化锌中还是锌在CuO层中都没有明显的扩散。磁性测量表明，在300K时具有铁磁性，这取决于CuO颗粒的大小，而不是CuO-ZnO界面面积。偏振中子反射仪测量表明，观测到的磁化强度不能完全用CuO-ZnO界面附近或CuO层中的自旋来解释。
We investigated the magnetic properties of CuO–ZnO heterostructures to elucidate the origin of the ferromagnetic signature in Cu doped ZnO. The CuO and ZnO layer thickness were varied from 15 to 150 nm and from 70to350nm, respectively. Rutherford backscattering experiments showed no significant diffusion of either Cu in ZnO or Zn in CuO layers. Magnetic measurements indicate ferromagnetism at 300K, which depends on the CuO particle size, but not on the CuO–ZnO interfacial area. Polarized neutron reflectometry measurements show that the observed magnetization cannot be accounted for solely by spins localized near the CuO–ZnO interface or in the CuO layer.