Effect of α-Particle Irradiation on the Magnetic Properties of Ni Nanowires

被引：3
|
作者：
Singh, Ashutosh K. [1 ]
Das, Bipul [1 ]
Sen, Pintu [2 ]
Bandopadhyay, Sujit Kumar [2 ]
Mandal, Kalyan [1 ]
机构：
[1] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India
[2] Ctr Variable Energy Cyclotron, Kolkata 700064, India
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2014年 / 50卷 / 11期
关键词：
alpha-particle irradiation; electrodeposition; magnetic properties; nickel (Ni) nanowires (NWs); BARKHAUSEN NOISE; ARRAYS; MEMBRANES;
D O I：
10.1109/TMAG.2014.2322575
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report the effect of alpha-particle irradiation on the magnetic properties of nickel (Ni) nanowires (NWs) arrays with diameter of each NW similar to 100 nm prepared by electrodeposition using anodic alumina oxide (AAO) membranes. Different doses of alpha-particles irradiation, up to 2x10(16)alpha/cm(2) were used to observe the effect. Structural characterization indicates the reduction in crystallinity of Ni NWs after irradiation. Coercivity (H-c) was found to increase with alpha-particle dose due to the formation of pinning centers. The magnetic easy axis changed direction from in-plane (with AAO template) to the out-of-plane due to the decrease in magnetocrystalline anisotropy by alpha-particle irradiation. Furthermore, the effect of alpha-particle irradiation on Ni NWs was studied by magnetic Barkhausen noise measurements.
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页数：4
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