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A complex magnetic study: evidence of spin-glass transition below long-range magnetic ordering and its correlation with renormalization of phonon modes.
J Phys Condens Matter
August 2024
Department of Physics, National Institute of Technology Patna, Bihar 800005, India.
In this paper, we report a complex magnetic behavior arising due to the interplay of three active magnetic cations (Nd/Sm, Co and Ir), forming 3d-5d-4f magnetic sublattices. The B-site ordered double perovskites NdCoIrOand SmCoIrOwere successfully prepared by conventional solid-state method. Detailed structural analysis revealed that both samples crystallized in monoclinic structure with P2/n (No.
View Article and Find Full Text PDFStructural and vibrational properties of lanthanide Lindqvist polyoxometalate complexes.
Dalton Trans
June 2024
Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA.
Molecular spin qubits have demonstrated immense potential in quantum information science research due to the addressability of electron spins using microwave frequencies, and the scalability and tunability of molecular systems. Exemplary in this regard is the holmium polyoxometalate, [NaHo(WO)]·35HO (HoW), which features an accessible atomic clock transition at 9.4 GHz; however, the coherence time of this molecule is limited by spin-phonon coupling driven decoherence processes.
View Article and Find Full Text PDFAt the cutting edge of high-performance single-molecule magnets (SMMs) lie lanthanide-based complexes, renowned for their potent magnetic anisotropy. SMMs containing one metal centre are defined as single-ion magnets (SIMs). The performance of SMMs is measured generally the barrier height for magnetisation reversal () and blocking temperature (), below which the magnetisation is fully frozen.
View Article and Find Full Text PDFLow temperature Raman spectroscopic study of anharmonic and spin-phonon coupled quasi-two dimensional rare earth based francisites.
J Phys Condens Matter
February 2024
Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
Mineral francisites CuBi(SeO)OCl are unique compounds with interesting quasi two-dimensional structure along with fascinating magnetic properties. The magnetic properties can be fine-tuned when non-magnetic Bi is replaced by a suitable rare earth (RE) metal. It is because of the inclusion of additional magnetic sub-centre RE apart from Cu.
View Article and Find Full Text PDFHalobenzene Adducts of a Dysprosocenium Single-Molecule Magnet.
Inorg Chem
May 2024
Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
Article Synopsis
- Dysprosium complexes, especially isolated dysprosocenium cations, show potential as single-molecule magnets (SMMs) for high-density data storage, particularly with observable magnetic hysteresis above liquid nitrogen temperatures.
- The research investigates how equatorial coordination of halobenzenes alters magnetic behavior, which is attributed to increased relaxation mechanisms that depend on halide electronegativity and interaction number.
- Despite the introduction of transverse fields from halobenzenes, the barriers to magnetization reversal in these complexes remain relatively high and close to those of the original dysprosocenium complex.
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