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1. Optical transitions of neutral Mg in Mg-doped β -Ga 2 O 3

   https://doi.org/10.1063/5.0081925  

   Bhandari, Suman ; Lyons, John L. ; Wickramaratne, Darshana ; Zvanut, M. E. ( February 2022 , APL Materials)
2. Elucidating the Impact of Mg Substitution on the Properties of NASICON‐Na 3+ y V 2− y Mg y (PO 4 ) 3 Cathodes

   https://doi.org/10.1002/adfm.202105463  

   Ghosh, Subham ; Barman, Nabadyuti ; Gonzalez‐Correa, Eliovardo ; Mazumder, Madhulika ; Zaveri, Aryan ; Giovine, Raynald ; Manche, Alexis ; Pati, Swapan K. ; Clément, Raphaële J. ; Senguttuvan, Premkumar ( August 2021 , Advanced Functional Materials)

   Vanadium multiredox‐based NASICON‐Na_zV_2−yM_y(PO₄)₃(3 ≤z ≤ 4; M = Al³⁺, Cr³⁺, and Mn²⁺) cathodes are particularly attractive for Na‐ion battery applications due to their high Na insertion voltage (>3.5 V vs Na⁺/Na⁰), reversible storage capacity (≈150 mA h g⁻¹), and rate performance. However, their practical application is hindered by rapid capacity fade due to bulk structural rearrangements at high potentials involving complex redox and local structural changes. To decouple these factors, a series of Mg²⁺‐substituted Na_3+yV_2−yMg_y(PO₄)₃(0 ≤y ≤ 1) cathodes is studied for which the only redox‐active species is vanadium. While X‐ray diffraction (XRD) confirms the formation of solid solutions between they = 0 and 1 end members, X‐ray absorption spectroscopy and solid‐state nuclear magnetic resonance reveal a complex evolution of the local structure upon progressive Mg²⁺substitution for V³⁺. Concurrently, the intercalation voltage rises from 3.35 to 3.45 V, due to increasingly more ionic VO bonds, and the sodium (de)intercalation mechanism transitions from a two‐phase fory ≤ 0.5 to a solid solution process fory ≥ 0.5, as confirmed by in operando XRD, while Na‐ion diffusion kinetics follow a nonlinear trend across the compositional series.

    

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3. Growth and properties of epitaxial Ti 1−x Mg x N(001) layers

   https://doi.org/10.1116/1.5049957  

   Wang, Baiwei ; Kerdsongpanya, Sit ; McGahay, Mary E. ; Milosevic, Erik ; Patsalas, Panos ; Gall, Daniel ( November 2018 , Journal of Vacuum Science & Technology A)
4. Tunable Infrared Plasmonic Properties of Epitaxial Ti 1–x Mg x N(001) Layers

   https://doi.org/10.1021/acsami.1c03667  

   Wang, Baiwei ; Nawarat, Poomirat ; Lewis, Kim Michelle ; Patsalas, Panos ; Gall, Daniel ( May 2021 , ACS Applied Materials & Interfaces)

   null (Ed.)
5. The importance of the Mg–Mg interaction in Mg 3 Sb 2 –Mg 3 Bi 2 shown through cation site alloying

   https://doi.org/10.1039/C9TA11328B  

   Wood, Max ; Imasato, Kazuki ; Anand, Shashwat ; Yang, Jiong ; Snyder, G. Jeffrey ( January 2020 , Journal of Materials Chemistry A)

   Herein we study the effect alloying Yb onto the octahedral cite of Te doped Mg 3 Sb 1.5 Bi 0.5 has on transport and the material's high temperature stability. We show that the reduction in mobility can be well explained with an alloy scattering argument due to disrupting the Mg octahedral –Mg tetrahedral interaction that is important for placing the conduction band minimum at a location with high valley degeneracy. We note this interaction likely dominates the conducting states across n-type Mg 3 Sb 2 –Mg 3 Bi 2 solid solutions and explains why alloying on the anion site with Bi isn't detrimental to Mg 3 Sb 2 's mobility. In addition to disrupting this Mg–Mg interaction, we find that alloying Yb into the Mg 3 Sb 2 structure reduces its n-type dopability, likely originating from a change in the octahedral site's vacancy formation energy. We conclude showing that while the material's figure of merit is reduced with the addition of Yb alloying, its high temperature stability is greatly improved. This study demonstrates a site-specific alloying effect that will be important in other complex thermoelectric semiconductors such as Zintl phases. 

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