The Magnetostriction of Amorphous Magnetic Microwires: The Role of the Local Atomic Environment and Internal Stresses Relaxation

IF 2.6 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Magnetochemistry Pub Date : 2023-10-20 DOI:10.3390/magnetochemistry9100222

Valentina Zhukova, Alfonso García-Gómez, Alvaro Gonzalez, Margarita Churyukanova, Sergey Kaloshkin, Paula Corte-Leon, Mihail Ipatov, Jesus Olivera, Arcady Zhukov

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Abstract

We studied the magnetostriction coefficients, λs, Curie temperature, Tc, and their dependence on annealing conditions in Fe47Ni27Si11B13C2 and Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6 amorphous glass-coated microwires with rather different character of hysteresis loops. A positive λs ≈ 20 × 10−6 is observed in as-prepared Fe47Ni27Si11B13C2, while low and negative λs ≈ −0.3 × 10−6 is obtained for Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6 microwire. Annealing affects the magnetostriction coefficients and Curie temperatures, Tc, of both Fe47Ni27Si11B13C2 and Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6 glass-coated microwires in a similar way. Observed dependencies of hysteresis loops, λs and Tc on annealing conditions are discussed in terms of superposition of internal stresses relaxation and structural relaxation of studied microwires. We observed linear λs dependence on applied stress, σ, in both studied microwires. A decrease in the magnetostriction coefficient upon applied stress is observed for Co-rich microwires with low and negative magnetostriction coefficient. On the contrary, for Fe-Ni-rich microwires with a positive magnetostriction coefficient, an increase in the magnetostriction coefficient with applied stress is observed. The observed results are discussed considering the internal stresses relaxation and short range atomic rearrangements induced by annealing on hysteresis loops, magnetostriction coefficients and Curie temperatures of studied microwires.

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非晶磁微线的磁致伸缩:局部原子环境和内应力松弛的作用

研究了Fe47Ni27Si11B13C2和Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6具有不同磁滞回线特性的非晶玻璃包覆微丝的磁致伸缩系数、λs、居里温度、Tc及其与退火条件的关系。制备的Fe47Ni27Si11B13C2微丝的λs≈20 × 10−6为正值，而Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6微丝的λs≈−0.3 × 10−6为负值。退火对Fe47Ni27Si11B13C2和Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6玻璃包覆微丝的磁致伸缩系数和居里温度Tc的影响相似。从内应力松弛和结构松弛的叠加角度讨论了观察到的磁滞回线、λs和Tc对退火条件的依赖关系。我们观察到，在两种所研究的微丝中，λs与外加应力σ呈线性关系。对于低磁致伸缩系数和负磁致伸缩系数的富钴微丝，观察到施加应力后磁致伸缩系数减小。相反，对于具有正磁致伸缩系数的富铁镍微丝，观察到磁致伸缩系数随外加应力的增加而增加。考虑了磁滞回线退火引起的内应力松弛和短程原子重排、磁致伸缩系数和居里温度等因素，对观察结果进行了讨论。

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来源期刊

Magnetochemistry Chemistry-Chemistry (miscellaneous)

CiteScore

3.90

自引率

11.10%

发文量

145

审稿时长

11 weeks

期刊介绍： Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.