Barat Achinuq

High-Temperature ferromagnetism from site-selective filling in (Fe,Ni)$_{6-δ}$GeTe$_2$

Tyler Werner, Jonathan Reichanadter, Xiang Chen, Pranab K. Nag et autres

The discovery of high-temperature ferromagnetism in the metallic van der Waals (vdW) system Fe$_N$GeTe$_2$ has brought two-dimensional (2D) magnets into technologically relevant temperature scales. Specifically at N = 5, dilution of magnetic moments by nickel substitution counterintuitively achieves a record high Curie …

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Perpendicular switching of polarization in layered ferroelectrics

Pushpendra Gupta, Sergio Puebla, Fernando Gómez‐Ortiz, Xinyan Li et autres

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Supplemental material to "Field-induced condensation of π to 2π soliton lattices in chiral magnets"

Moritz Winter, Alessandro Pignedoli, Marein Rahn, Alessandro Sukhanov et autres

This dataset contains the experimental and simulation data underlying the figures of the corresponding publication, which reports a field-induced crossover from π to 2π chiral soliton lattices in the Heusler compound Mn1.4PtSn. All measurements were performed on the same focused-ion-beam lamella at …

Trans-switching in layered ferroelectrics

Ramamoorthy Ramesh, Pushpendra Gupta, Sergio Puebla, Fernando Gómez Ortiz et autres

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Electrical Switching and Imaging of Antiferromagnetic Spins in Perovskite Epitaxial Thin Films

Joseph Lanier, Justin Michel, Daniel Russell, Binzhi Liu et autres

Electrical control of antiferromagnets is essential for the field of antiferromagnetic spintronics, which promises ultrafast speed and terahertz dynamics. However, the large family of complex oxide antiferromagnets such as perovskites has been largely unexplored. Here, we demonstrate electrical switching and detection of …

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Structural and Magnetic Properties of Sputtered Chromium-Doped Sb2Te3 Thin Films

Joshua Bibby, Angadjit Singh, Emily Heppell, Jack Bollard et autres

Magnetron sputtering offers a scalable route to magnetic topological insulators (MTIs) based on Cr-doped Sb2Te3. We combine a range of X-ray diffraction (XRD), reciprocal-space mapping (RSM), scanning transmission electron microscopy (STEM), scanning TEM-energy-dispersive X-ray spectroscopy (STEM-EDS), and X-ray absorption spectroscopy, and X-ray …

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Dipolar Aleppo lattice: Ground state ordering and ergodic dynamics in the absence of vertex frustration

Davis Crater, Gopi Mahato, Christian Hoyt, Duncan Miertschin et autres

We introduce the Aleppo spin ice geometry, another variation of decimated square ice patterns, which in contrast to similar systems previously studied, does not exhibit vertex frustration. Using synchrotron-based photoemission electron microscopy, we directly visualize low-energy states achieved after thermal annealing, in …

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Microscopic Observation of Non-Ergodic States in Two-Dimensional Non-Topological Bubble Lattices

Sergi Pylypenko, M. Winter, U. Rößler, Darius Pohl et autres

Disordered 2D lattices, including hexatic and various glassy states, are observed in a wide range of 2D systems including colloidal nanoparticle assemblies and fluxon lattices. Their disordered nature determines the stability and mobility of these systems, as well as their response to …

Synthesis of Nanocrystalline Mn-Doped Bi2Te3 Thin Films via Magnetron Sputtering

Joshua Bibby, Angadjit Singh, Emily Heppell, Jack Bollard et autres

This study reports the structural and magnetic properties of Mn-doped Bi2Te3 thin films grown by magnetron sputtering. The films exhibit a ferromagnetic response that depends on the Mn doping concentration, as revealed by X-ray magnetic circular dichroism measurements. At an Mn concentration …

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The dipolar Aleppo lattice: Ground state ordering and ergodic dynamics in the absence of vertex frustration

Gopi Mahato, Davis Crater, Christian Hoyt, Kevin Hofhuis et autres

We introduce the Aleppo spin ice geometry, another variation of decimated square ice patterns, which in contrast to similar systems previously studied, does not exhibit vertex frustration. Using synchrotron-based photoemission electron microscopy, we directly visualize low-energy states achieved after thermal annealing, in …

Voltage-induced magnetic domain evolution in a phase-change material

Tian-Yue Chen, Dayne Sasaki, Barat Achinuq, Nareg Ghazikhanian et autres

Applying voltage to metal–insulator transition (MIT) materials allows electrical actuation of the local electronic phase state. In MIT systems that have the electronic order coupled with the magnetic order, voltage switching of the electronic phase state can also enable the electrical manipulation …

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Ice-rule driven vertex frustration in a stretched pentagonal spin ice

Davis Crater, Anya C. Lätti, Michael Saccone, Kevin Hofhuis et autres

We introduce the stretched pentagonal spin ice and study low-energy configurations achieved after thermal annealing. Using synchrotron-based photoemission electron microscopy, we reveal highly disordered configurations dominated by short-range order. Real-space observations reveal that an adherence to local order, in the form of …

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