Structural and magnetic properties of Cu-alloyed FePd films

Structural and magnetic properties of Cu-alloyed FePd films
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铜合金 FePd 薄膜的结构和磁性能

DOI:
10.1016/j.jmmm.2015.01.017
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发表时间:
2015
影响因子:
2.7
通讯作者:
M. Marszałek
M. Marszałek
中科院分区:
材料科学3区
文献类型:
--
作者:
A. Polit;D. Makarov;C. Brombacher;M. Krupinski;M. Perzanowski;Y. Zabila;M. Albrecht;M. Marszałek

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在室温下,在Si(001)/SiO2(400 nm)衬底上制备了多层膜[Cu(dCl 3)/Fe(9 μ m)/Pd(11 μ m)] 5。为了诱导化学L10有序化,对沉积态样品进行后退火,即在600 °C下快速热退火(RTA)90 s,然后在700 °C的超高真空(UHV)中加热长达数小时。在这项研究中,后退火的FePdCu合金薄膜的结构和磁性能的依赖于Cu含量的影响进行了研究。结果表明,Cu的加入对FePd合金的化学有序化过程和(001)织构的形成有很大的影响。RTA处理后,仅观察到具有几百mT范围内的矫顽场的易磁化轴的各向同性分布。相比之下,在700 °C下额外加热1 h的样品显示出面外易磁化轴,对于含有10 at% Cu的样品,其有效磁各向异性约为2× 105 J/m3。
Multilayer films [Cu(dÅ)/Fe(9 Å)/Pd(11 Å)]5were deposited at room temperature on Si(001)/SiO2(400 nm) substrates. In order to induce chemical L10ordering, the as-deposited samples were post-annealed by rapid thermal annealing (RTA) at 600 °C for 90 s followed additionally by heating in ultra-high vacuum (UHV) at 700 °C up to several hours. In this study the impact of post-annealing on the structural and magnetic properties of FePdCu alloy films in dependence on the Cu content was investigated. It was found that the addition of Cu to the FePd alloy has a strong influence on the chemical ordering process and the (001) texture formation. After the RTA treatment only an isotropic distribution of the easy axis of magnetization with coercive fields in the range of a few hundred mT was observed. In contrast, samples which were additionally heated for 1 h at 700 °C revealed an out-of-plane easy axis of magnetization with an effective magnetic anisotropy of about 2×105J/m3for the sample containing 10 at% of Cu.
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