Ferroelectrics are an integral component of the modern world and are of importance in electrics, electronics, and biomedicine. However, their usage in emerging wearable electronics is limited by inelastic deformation. We developed intrinsically elastic ferroelectrics by combining ferroelectric response and elastic resilience into one material by slight cross-linking of plastic ferroelectric polymers. The precise slight cross-linking can realize the complex balance between crystallinity and resilience. Thus, we obtained an elastic ferroelectric with a stable ferroelectric response under mechanical deformation up to 70% strain. This elastic ferroelectric exerts potentials in applications related to wearable electronics, such as elastic ferroelectric sensors, information storage, and energy transduction.

With the merits of high sensitivity, high stability, high flexibility, low cost, and simple manufacturing, flexible magnetic field sensors have potential applications in various fields such as geomagnetosensitive E-Skins, magnetoelectric compass, and non-contact interactive platforms. Based on the principles of various magnetic field sensors, this paper introduces the research progress of flexible magnetic field sensors, including the preparation, performance, related applications, etc. In addition, the prospects of flexible magnetic field sensors and their challenges are presented.

Elastic polymer-based conductive composites (EPCCs) are of great potential in the field of flexible sensors due to the advantages of designable functionality and thermal and chemical stability. As one of the popular choices for sensor electrodes and sensitive materials, considerable progress in EPCCs used in sensors has been made in recent years. In this review, we introduce the types and the conductive mechanisms of EPCCs. Furthermore, the recent advances in the application of EPCCs to sensors are also summarized. This review will provide guidance for the design and optimization of EPCCs and offer more possibilities for the development and application of flexible sensors.

With a surge of interest in antiferromagnetic (AFM) spintronics, the manipulation and detection of different AFM states has become a topic of concern. In particular, a large magnetoresistive response is of critical importance for facilitating the readout of AFM states. Here, we report the observation of colossal angular magnetoresistance (AMR) in a layered AFM rare-earth dichalcogenide, ${\mathrm{EuTe}}_2$. The AMR reaches ∼40 000% at 2 K and 22 kOe, which is approximately four orders of magnitude larger than in AFM metals and alloys. Combined magnetization, resistivity, and theoretical analysis reveal strong coupling of the electronic state (metal vs insulator) to the vector spins, which mainly arises from the space-time inversion symmetry-broken correlated band reconstruction. Consequently, the anisotropic magnetization response to the vector magnetic field induces metal-insulator transition (MIT) and a large anisotropic magnetotransport that explains the experimental findings very well. These results suggest an avenue for exploring the spin configuration dependent transport properties for unique AFM spintronic devices.

We have investigated the magnetic properties of amorphous Co₄₀Fe₄₀B₂₀ (CoFeB) thin films grown on flexible polyimide (PI) substrates, which were fixed on convex molds with different curvatures during the magnetron sputtering deposition. When the flexible substrates were changed from convex to flat state after fabrication, a uniaxial magnetic anisotropy was induced in the CoFeB film due to magnetostrictive effect. Furthermore, the anisotropy also depends on the thicknesses of the film and substrate. Our results demonstrate a convenient method to tune the anisotropy of magnetic thin films grown on flexible substrates.