AC Potential-Dependent Concentration Variation and Domain Wall Pinning in CoZn ( x=0.4−0.5) Nanorods.

Autor: Ahmad, Naeem, Jaral, Amna, Bano, Gulbahar, Batool, Sidrah, Dilpazir, Hira, Jameel, Muhammad, Khan, Suleman, Iqbal, Javed, Majid, Abdul, Naseer, Muhammad, Shah, Saqlain
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Zdroj: Journal of Superconductivity & Novel Magnetism; Feb2016, Vol. 29 Issue 2, p509-513, 5p
Abstrakt: The CoZn ( x=0.4−0.5) nanorods were synthesized via an AC electrochemical deposition method into anodized aluminum oxide (AAO) templates at different voltages ranging from 10 to 18 V, and nanorods of varying concentrations of Co and Zn were obtained. The characterization tools were used to examine different aspects of nanorods, e.g., shape, size, morphology, chemical composition, and magnetic behavior. Scanning electron microscope (SEM) images show that CoZn nanorods have length L=1μm and diameter d=50 nm. The grain size was calculated to be 25.4 nm using an X-ray diffraction (XRD) technique. The XRD also shows some other phases of ZnCoO. The M− H loops measured by a vibrating sample magnetometer (VSM) at room temperature show pure ferromagnetic behavior at all AC potentials. The nanorods show magnetic isotropic behavior due to strong magnetic interactions and presence of random nanorods. The potential-dependent coercivity H and saturation magnetization M show a non-linear curve which is explained on the basis of magnetic islands and domain wall pinning. This study is useful to tune the magnetic properties of nanorods by a simple and low-cost technique. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index