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1. Anisotropic magnetic and transport properties of orthorhombic o-Pr ₂ Co ₃ Ge ₅

   https://doi.org/10.1088/2515-7639/ac9ad9  

   Kyrk, Trent M; Kennedy, Ellis R; Galeano-Cabral, Jorge; Wei, Kaya; McCandless, Gregory T; Scott, Mary C; Baumbach, Ryan E; Chan, Julia Y (October 2022, Journal of Physics: Materials)

   Abstract The crystal structure, electron energy-loss spectroscopy (EELS), heat capacity, and anisotropic magnetic and resistivity measurements are reported for Sn flux grown single crystals of orthorhombic Pr₂Co₃Ge₅(U₂Co₃Si₅-type,Ibam). Our findings show thato-Pr₂Co₃Ge₅hosts nearly trivalent Pr ions, as evidenced by EELS and fits to temperature dependent magnetic susceptibility measurements. Complex magnetic ordering with a partially spin-polarized state emerges nearT_sp= 32 K, with a spin reconfiguration transition nearT_M= 15 K. Heat capacity measurements show that the phase transitions appear as broad peaks in the vicinity ofT_spandT_M. The magnetic entropy further reveals that crystal electric field splitting lifts the Hund’s rule degeneracy at low temperatures. Taken together, these measurements show that Pr₂Co₃Ge₅is an environment for complexfstate magnetism with potential strongly correlated electron states. 

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2. Tunable synthesis of magnetoelectric CoFe ₂ O ₄ –BaTiO ₃ core–shell nanowires

   https://doi.org/10.1039/d4cc03701d  

   Ferson, Noah D; Ganiban, John R; Arnold, David P; Andrew, Jennifer S (November 2024, Chemical Communications)

   CoFe₂O₄–BaTiO₃core–shell nanowires with tunable magnetic anisotropy and magnetoelectric coupling are generated using a template-assisted synthetic procedure providing composition control. 

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3. Environmentally responsible synthesis of high-performance P2-Na _2/3 [Ni _1/3 Mn _2/3 ]O ₂ sodium-ion battery cathodes

   https://doi.org/10.1039/d4ta03708a  

   Fu, Jintao; Hassan, Mohamed H; Liu, Jiaxin; Koh, Hyeongjun; Ng, Alexander K; Bruzzi, Chiara; Corsi, John S; Detsi, Eric (January 2024, Journal of Materials Chemistry A)

   An environmentally responsible synthesis of Na_2/3[Ni_1/3Mn_2/3]O₂(NNMO) enabled by direct conversion of metallic Ni powder, releasing only O₂and H₂O as byproducts. The resulting NNMO exhibits excellent cycling performance as a Na-ion battery cathode. 

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4. Ca-repaired BaZrO ₃ nanorods/YBa ₂ Cu ₃ O _7-x interface for enhanced pinning in YBa ₂ Cu ₃ O _7-x nanocomposites with 2-8% BaZrO ₃ doping

   https://doi.org/10.1088/1757-899X/1302/1/012013  

   Wu, Judy; Panth, Mohan; Ogunjimi, Victor; Ann_Sebastian, Mary; Zhang, Di; Haugan, Timothy; Wang, Haiyan (May 2024, IOP Conference Series: Materials Science and Engineering)

   Abstract C-axis aligned BaZrO₃(BZO) nanorods formed via strain-mediated self-assembly in BZO-doped YaBa₂Cu₃O_7-x(BZO/YBCO) nanocomposite films can provide strong pinning to the quantized magnetic vortices. While the strain initiated from the BZO/YBCO lattice mismatch plays a critical role in nucleation and evolution of the BZO nanorods, it also leads to a highly defective BZO/YBCO interface and hence reduced pinning efficiency of BZO nanorods. This work reports a recent study in probing the effect of BZO/YBCO interface on the pinning efficiency of the BZO nanorods as the interface is repaired dynamically during the BZO nanorod growth using Ca doping. Within the BZO doping range of 2-8 vol.%, significantly enhanced pinning efficiency of the BZO nanorods have been observed. A peak enhancement up to five-fold of critical current density at 9.0 T and 65-77 K has been obtained in the 6 vol.% BZO/YBCO nanocomposites after the interface repair. This result not only illustrates the critical importance of the BZO/YBCO interface in the pinning efficiency, but also provides a facile scheme to achieve such an interface to restore the pristine pinning efficiency of the BZO nanorods. 

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5. Is surface modification effective to stabilize high-voltage cycling for layered P2-Na _2/3 Ni _1/3 Mn _2/3 O ₂ cathodes?

   https://doi.org/10.1039/D4CC02819H  

   Niu, Fangzhou; Qiao, Linna; Huang, Heran; Odero, Elninoh A; Zhou, Guangwen; Liu, Hao (October 2024, Chemical Communications)

   Surface coating of Na_2/3Ni_1/2Mn_2/3O₂particles suppresses high-voltage polarization but not capacity fade, which is dominated by bulk structure degradation. 

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