Marios Hadjimichael

The organisers of the Ferroelectrics UK and Ireland meeting in Bath really outdid themselves. Here's a photo of the group at the Roman Baths.

02.05.2025 07:09 — 👍 0    🔁 0    💬 0    📌 0

Join us at session QT04.06 today at 09:00 for some in-depth X-ray studies of ferroelectric superlattices (and stunning images of polarisation distributions and reciprocal space). #S25MRS @materials-mrs.bsky.social

09.04.2025 12:47 — 👍 1    🔁 0    💬 0    📌 0

A variety of quantum oxide crystal models arranged in a circle around the title "QUOROM 12" and the date "May 22, 2025"

Excited to announce QUOROM-12 on May 22, 2025!! Check out that link bio to see our invited speakers, register for free attendance, and submit your abstract before April 18!

19.03.2025 13:06 — 👍 1    🔁 2    💬 0    📌 0

Topochemical Synthesis and Electronic Structure of High-Crystallinity Infinite-Layer Nickelates on an Orthorhombic Substrate Superconductivity in infinite-layer nickelates has stirred much research interest, to which questions regarding the nature of superconductivity remain elusive. A critical leap forward to address these intricate questions is through the growth of high-crystallinity infinite-layer nickelates, including the “parent” phase. Here, we report the synthesis of a high-quality thin-film nickelate, NdNiO2. This is achieved through the growth of a perovskite precursor phase (NdNiO3) of superior crystallinity on the NdGaO3 substrate by off-axis RF magnetron sputtering and a low-temperature topochemical reduction using NaH. We observe a nonlinear Hall effect at low temperatures in this “non-doped” phase. We further study the electronic properties using advanced X-ray scattering and first-principles calculations. We observe spectroscopic indications of the enhanced two-dimensionality and a reduced hybridization of Nd 5d and Ni 3d orbitals. These findings unlock new pathways for preparing high-quality infinite-layer nickelates and provide new insights into the intrinsic features of these compounds.

Out now! We show that deposition of NdNiO3 on an orthorhombic substrate using off-axis RF magnetron sputtering can lead to a high-quality phase of the infinite-layer system, NdNiO2. Reduction using the more powerful NaH was necessary due to the high crystalline quality.
pubs.acs.org/doi/10.1021/...

15.01.2025 19:49 — 👍 1    🔁 0    💬 0    📌 0