Crystalline spin glasses are attractive compounds owing to their unique nature and applications. Here, we synthesised a bulk Pnma-type Mn7C3 spin glass by a high-temperature, high-pressure method. Experimental characterisation including X-ray diffraction and magnetic susceptibility measurements demonstrated that the compound has a triangular Ising-model-based structure, high freezing temperature of 37.4 K, and novel competition mechanism. Theoretical calculations and simulations revealed that the triangular Mn units are spontaneously frustrated and bridge neighbouring Mn units via polarised C atoms and messenger Mn atoms. Triangular C units each share one electron within a three-pronged electron cloud. This electron is the direct cause of frustration and competition in Mn7C3. The competition within the triangular Mn units suggests that the possible magnetic configurations are highly degenerate and that the Mn7C3 spin glass has high robustness. This work introduces a new family of spin glasses with ordered microgeometries that drive electronic structure disorder, and an application-friendly spin-glass material for use in fields like high-efficiency hardware and algorithm design in artificial intelligence.
MnPtGa hosts competing magnetic states, including ferromagnetic, canted antiferromagnetic, and spin density wave (SDW) order in the centrosymmetric $P6_3/mmc$ structure, while a related inversion-broken structure supports chiral skyrmions. Controlling this competition motivates materials platforms that enable tunable s...
R. S. Rawat, Fan Fei, Zachary LaDuca et al.· 0 citations
Here, we report an interesting magnetic oxide Na 3Ni 2SbO 6, where the interplay between exchange interactions and lattice symmetry crucially influence its exotic ground state (GS). This compound features a layered honeycomb lattice with magnetic Ni 2+ (spin-1) surrounding nonmagnetic Sb 5+ centers. The x-ray absorptio...
R. Patel, B. Saha, Debashish Das et al.· Journal of Physics: Condense...· 0 citations
A-site-ordered quadruple perovskites (AA′3B4O12) exhibit rich electronic and magnetic behaviors arising from the coexistence of multiple transition-metal sublattices. Here we report the high-pressure synthesis and comprehensive characterization of SrCu3Mn4O12, a previously unknown Sr-based member of the A2+Cu3Mn4O12...
We report the coexistence of long-range ferromagnetic ordering and cluster spin-glass behavior in a face-centered cubic nickel vanadium hexacyanoferrate molecular magnet (space group Fm3m, lattice parameter of ∼10.14 Å). The dc magnetization measurements exhibit Curie-Weiss behavior in the high-temperature paramagnetic...
Nilasha Maiti, P. Bhatt, Mayuresh D. Mukadam et al.· Dalton Transactions· 0 citations
The relationship between local coordination, framework connectivity, and lattice scattering, electronic structure, and quantum transport in complex pnictides remains poorly understood. Here, we show that Cu-As polyhedral architecture provides a structural route to tuning scattering and quantum magnetotransport in Ba-Cu...
Souvik Sasmal, Heng-Di Zhao, S. Shahabfar et al.· Proceedings of the National...· 0 citations
In this combined experimental and theoretical study, we investigate the role of disorder in governing the magnetic ground state of the quaternary Heusler alloy FeRuMnGe. In the FeRuMnZ (Z = Ga, Si) series, chemical substitution modifies atomic ordering and electronic structure, resulting in distinct magnetic ground sta...
Manikantha Panda, P. Mishra, S. S. Pradhan et al.· 1 citation
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