The critical size between single domain and multidomain in L10-FePt particles
The critical size between single domain and multidomain in L10-FePt particles
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DOI：
10.1063/1.2830679
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发表时间：
2008-04-01
影响因子：
3.2
通讯作者：
Kitakami, O.
中科院分区：
文献类型：
--
作者：
Kikuchi, N.;Okamoto, S.;Kitakami, O.
本文研究了L_1（0）-FePt单晶颗粒中单畴与多畴的临界直径。通过在1173 K下在MgO（100）上沉积FePt来制备颗粒，并且通过在2-10 nm的范围内改变标称沉积厚度来使颗粒的直径从几纳米到超过一百纳米。在面内场作用下，测量了沉积态和退磁态的初始反常霍尔效应曲线。通过分析初始曲线获得的单畴临界直径对于两种初始状态都是一致的，并且对于10 nm的标称厚度，d（c）类似于55 nm。
The critical diameter between single domain and multidomain in single crystal L1(0)-FePt particles has been studied. The particles are fabricated by depositing FePt on MgO(100) at 1173 K and the diameter was ranged from a few to over a hundred nanometers by changing nominal deposition thickness in the range of 2-10 nm. Initial anomalous Hall effect (AHE) curves were measured for as-deposited state and demagnetized state with in-plane field. The critical diameter for single domain obtained by analyzing initial curves coincides for both initial states and d(c)similar to 55 nm for nominal thickness of 10 nm.