NMR Spin-Echo Study of the Domain Wall Pinning in Cobalt Micropowders

被引：0
|
作者：
Gavasheli, Tsisana [1 ]
Mamniashvili, Grigor [2 ]
Ghvedashvili, Giorgi [1 ]
Gegechkori, Tatiana [2 ]
机构：
[1] Ivane Javakhishvili Tbilisi State Univ TSU, EEE Dept, Fac Exact & Nat Sci, Tbilisi, Georgia
[2] Ivane Javakhishvili Tbilisi State Univ TSU, Andronikashvili Inst Phys, Tbilisi, Georgia
来源：
2022 IEEE 2ND UKRAINIAN MICROWAVE WEEK, UKRMW | 2022年
基金：
美国国家科学基金会;
关键词：
nuclear spin echo; magnetic video pulse; singlepulse; echo; cobalt; lithium-zinc ferrite; domain wall mobility; pinning;
D O I：
10.1109/UKRMW58013.2022.10037055
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：
The pinning force of domain walls was studied by the NMR two-pulse spin-echo method using the action of an additional magnetic video-pulse. It is shown that the pinning force value H-0 is inversely proportional to the duration tau(m) of the magnetic video-pulse. In addition, the area of the magnetic video-pulse A(m) = H-0 tau(m) turned out to be the constant for all threshold durations of the magnetic video-pulse. The dependence of the pinning force H-0 on the external magnetic field He is also studied. It is shown that up to 3 kOe, a linear dependence of H-0 on H-e is observed. This indicates that, as He increases, the domain walls are distributed over positions corresponding to the stronger pinning centers.
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页码：405 / 409
页数：5
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