Heteroepitaxy of Co-Based Heusler Compound/Muscovite for Flexible Spintronics

Yi Cheng Chen, Min Yen, Yu Hong Lai, Anastasios Markou, Liguo Zhang, Yi Ying Chin, Hong Ji Lin, Chien Te Chen, Claudia Felser, Ying Hao Chu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Materials with high spin-polarization play an important role in the development of spintronics. Co-based Heusler compounds are a promising candidate for practical applications because of their high Curie temperature and tunable half-metallicity. However, it is a challenge to integrate Heusler compounds into thin film heterostructures because of the lack of control on crystallinity and chemical disorder, critical factors of novel behaviors. Here, muscovite is introduced as a growth substrate to fabricate epitaxial Co2MnGa films with mechanical flexibility. The feature of heteroepitaxy is evidenced by the results of X-ray diffraction and transmission electron microscopy. Moreover, high chemical ordering with superior properties is delivered according to the observation of large Hall conductivity (680 ω-1 cm-1) and highly saturated magnetic moment (∼3.93 μB/f.u.), matching well with bulk crystals. Furthermore, the excellence of magnetic and electrical properties is retained under the various mechanical bending conditions. Such a result suggests that the development of Co2MnGa/muscovite heteroepitaxy provides not only a pathway to the thin film heterostructure based on high-quality Heusler compounds but also a new aspect of spintronic applications on flexible substrates.

Original languageEnglish
Pages (from-to)35162-35168
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number38
DOIs
StatePublished - 25 Sep 2019

Keywords

  • flexible
  • Heusler compound
  • magnetism
  • muscovite
  • spintronics

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