Structural and magnetic properties of a stage-2 HoCl3-graphite intercalation compound
Source abstract
Abstract
Abstract A stage-2 HoCl 3 -GIC has been synthesized and characterized by XRD experiments and magnetic measurements. EDS and 00l X-ray analyses lead to the chemical formula C 23.8 HoCl 3.7. The c -axis repeat distance is 1313 ± 5 pm, and the stacking sequence of intercalated HoCl 3 along the c -axis corresponds to the layer sandwich Cl–Ho–Cl, where the distance between Ho and Cl layers is 157 pm. The HoCl 3 in-plane structure is oblique with lattice parameters a = 689 pm, b = 1177 pm, γ = 149.6° close to those in the pristine crystal. It presents two different micro-domains disorientated with respect to graphene planes by θ 1 = ± 19°. Magnetic studies show that Ho 3+ ions obey the Curie–Weiss law for both pristine HoCl 3 and stage-2 HoCl 3 -GIC. The presence of graphene planes between HoCl 3 intercalated layers leads to an increased Curie–Weiss temperature and to a decrease in the weak antiferromagnetic interactions between Ho 3+ ions.
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OpenAlex topics: Advancements in Battery Materials · Graphene research and applications · Fiber-reinforced polymer composites
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