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.

引用

页码：405 / 409

页数：5

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