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Conductive surface states and Kondo exhaustion in insulating YbIr3Si7

https://doi.org/10.1103/PhysRevB.109.035112

Stavinoha, Macy ; Huang, C.-L. ; Phelan, W. Adam ; Hallas, Alannah M. ; Loganathan, V. ; Michiardi, M. ; Falke, J. ; Zhdanovich, Sergey ; Takegami, D. ; Liu, C.-E. ; et al ( January 2024 , Physical Review B)

Free, publicly-accessible full text available January 1, 2025
Magnetic properties of double perovskite Ln2CoIrO6 (Ln=Eu, Tb, Ho) : Hetero-tri-spin 3d−5d−4f systems

https://doi.org/10.1103/PhysRevB.99.014438

Ding, Xiaxin ; Gao, Bin ; Krenkel, Elizabeth ; Dawson, Charles ; Eckert, James C. ; Cheong, Sang-Wook ; Zapf, Vivien ( January 2019 , Physical Review B)
Near‐Room‐Temperature Magnetoelectric Coupling via Spin Crossover in an Iron(II) Complex

https://doi.org/10.1002/anie.202214335

Owczarek, Magdalena ; Lee, Minseong ; Liu, Shuanglong ; Blake, Ella R. ; Taylor, Chloe S. ; Newman, Georgia A. ; Eckert, James C. ; Leal, Juan H. ; Semelsberger, Troy A. ; Cheng, Hai‐Ping ; et al ( November 2022 , Angewandte Chemie International Edition)

Abstract
Magnetoelectric coupling is achieved near room temperature in a spin crossover Fe^IImolecule‐based compound,[Fe(1bpp)₂](BF₄)₂. Large atomic displacements resulting from Jahn–Teller distortions induce a change in the molecule dipole moment when switching between high‐spin and low‐spin states leading to a step‐wise change in the electric polarization and dielectric constant. For temperatures in the region of bistability, the changes in magnetic and electrical properties are induced with a remarkably low magnetic field of 3 T. This result represents a successful expansion of magnetoelectric spin crossovers towards ambient conditions. Moreover, the observed 0.3–0.4 mC m⁻²changes in theH‐induced electric polarization suggest that the high strength of the coupling obtained via this route is accessible not just at cryogenic temperatures but also near room temperature, a feature that is especially appealing in the light of practical applications.

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