Magnetic properties and microstructures of multi-component Sm–Co-based films prepared by high-throughput experiments

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-07-27 DOI:10.1007/s12598-024-02902-7

Xin-Rui Zheng, Si-Zhe Liang, Zhao-Guo Qiu, Yan-Song Gong, Hong-Xia Meng, Gang Wang, Zhi-Gang Zheng, Wei-Xing Xia, De-Chang Zeng, Ping Liu

{"title":"Magnetic properties and microstructures of multi-component Sm–Co-based films prepared by high-throughput experiments","authors":"Xin-Rui Zheng, Si-Zhe Liang, Zhao-Guo Qiu, Yan-Song Gong, Hong-Xia Meng, Gang Wang, Zhi-Gang Zheng, Wei-Xing Xia, De-Chang Zeng, Ping Liu","doi":"10.1007/s12598-024-02902-7","DOIUrl":null,"url":null,"abstract":"Sm–Co-based films play an irreplaceable role in special applications due to their high curie temperature and magnetocrystalline anisotropic energy, especially in heat-assisted magnetic recording (HAMR), but the complex composition of Sm–Co phase and unclear synergistic coupling mechanisms of multi-elemental doping become the challenges to enhance the properties. In this work, a novel strategy combining magnetron sputtering and a high-throughput experiment method is applied to solve the above-mentioned problems. Fe/Cu co-doping highly increases the remanence while maintaining a coercivity larger than 26 kOe, leading to an enhancement of the magnetic energy product to 18.1 MGOe. X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) reveals that SmCo5 phase occupies the major fraction, with Co atoms partially substituted by Fe and Cu atoms. In situ Lorentz transmission electron microscopy (LTEM) observations show that the Sm (Co, Cu)5 phase effectively prohibits domain wall motions, leading to an increase of coercivity (Hc). Fe doping increases the low saturation magnetization (Ms) and low remanence (Mr) due to the Fe atom having a higher saturation magnetic moment. The magnetization reversal behaviors are further verified by micromagnetic simulations. Our results suggest that Sm–Co-based films prepared via Fe/Cu co-doping could be a promising candidate for high-performed HAMR in the future.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"69 1","pages":""},"PeriodicalIF":9.6000,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02902-7","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Sm–Co-based films play an irreplaceable role in special applications due to their high curie temperature and magnetocrystalline anisotropic energy, especially in heat-assisted magnetic recording (HAMR), but the complex composition of Sm–Co phase and unclear synergistic coupling mechanisms of multi-elemental doping become the challenges to enhance the properties. In this work, a novel strategy combining magnetron sputtering and a high-throughput experiment method is applied to solve the above-mentioned problems. Fe/Cu co-doping highly increases the remanence while maintaining a coercivity larger than 26 kOe, leading to an enhancement of the magnetic energy product to 18.1 MGOe. X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM) reveals that SmCo₅ phase occupies the major fraction, with Co atoms partially substituted by Fe and Cu atoms. In situ Lorentz transmission electron microscopy (LTEM) observations show that the Sm (Co, Cu)₅ phase effectively prohibits domain wall motions, leading to an increase of coercivity (H_c). Fe doping increases the low saturation magnetization (M_s) and low remanence (M_r) due to the Fe atom having a higher saturation magnetic moment. The magnetization reversal behaviors are further verified by micromagnetic simulations. Our results suggest that Sm–Co-based films prepared via Fe/Cu co-doping could be a promising candidate for high-performed HAMR in the future.

Graphical abstract

Abstract Image

查看原文本刊更多论文

通过高通量实验制备的多组分 Sm-Co 基薄膜的磁性能和微观结构

钐钴基薄膜具有高居里温度和磁晶各向异性能，在特殊应用中发挥着不可替代的作用，尤其是在热辅助磁记录（HAMR）中，但钐钴相成分复杂，多元素掺杂的协同耦合机制不明确，成为提高其性能的难题。本研究采用磁控溅射和高通量实验相结合的新策略解决了上述问题。在保持大于 26 kOe 的矫顽力的同时，铁/铜共掺杂极大地提高了剩磁，从而将磁能积提高到 18.1 MGOe。X 射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）显示，SmCo5 相占主要部分，钴原子部分被铁原子和铜原子取代。原位洛伦兹透射电子显微镜（LTEM）观察表明，Sm（Co，Cu）5 相有效地抑制了畴壁运动，从而提高了矫顽力（Hc）。由于铁原子具有较高的饱和磁矩，因此掺杂铁会增加低饱和磁化（Ms）和低剩磁（Mr）。微磁模拟进一步验证了磁化反转行为。我们的研究结果表明，通过铁/铜共掺杂制备的 Sm-Co 基薄膜有望成为未来高性能 HAMR 的候选材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.