Abstract
This work examines the entanglement and correlation state between the assembled spins of a magnetic trimer by using the magnetic specific heat CM as a thermal observable and the critical magnetic fields as factorization fingerprints. We show that the entanglement of the (Cr7Ni)2Cu trimer as a function of the temperature and external magnetic field becomes a quantifiable quantity when a Dzyaloshinskii–Moriya (DM) interaction is considered. Such entanglement is characterized by critical magnetic fields at which the bipartite density matrices display an abrupt change between factorable and entangled states. In (Cr7Ni)2Cu magnets as well as in trimers with local S≠12 the DM interaction shifts the critical factorizing fields to quantifiable thermal regimes where they could be detected by magnetic specific heat measurements.
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