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Tailoring non-collinear magnetic states in La-doped lithium ferrites via strain-induced cationic redistribution

Changyuan Chen, Lianmiao Lv, Jianyu Pan, Hao Xu et al.

The precise modulation of magnetic coupling in spinel ferrites is essential for magnetoelectronic applications. This study investigates Li0.5Cr0.1Al0.1Fe2.3-xLaxO4 (x=0-0.05) nanocrystals synthesized via a sol-gel method. Rietveld refinement and Williamson-Hall analysis reveal that large-radius La3+ ions occupy octahedral (B) sites, inducing lattice expansion and stabilizing gr…

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d-band filling dictates magnetic stability in Mn- and Co-substituted FeRh alloys

Greeshma R., Rudra Banerjee

The composition-dependent magnetic properties of B2-ordered \zfr~alloys with substitutional disorder on the Fe sublattice are investigated using first-principles calculations within the coherent potential approximation. By systematically substituting Mn and Co on the Fe sublattice, we establish $d$-band filling as the primary control parameter governing magnetic stability in th…

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