Phase formation in L10 magnets

L10 CrPt phase formation and magnetic properties

Electrodeposition of coercive L10 FePt magnets

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Formation of Fe3Pt phase in FePt-based nanocomposite magnets

Atomic interdiffusion between FePt and Fe3O4 nanoparticles in annealed FePt-based nanocomposite magnets has been studied by means of structural and magnetic characterizations. The results show that the Fe3Pt phase is formed during the annealing only when the mass ratio x of Fe3O4/FePt is larger than 1/20. When x 1/20, only FePt single phase is formed. It is interesting to find that the coercivi...

Berry-phase blockade in single-molecule magnets.

We formulate the problem of electron transport through a single-molecule magnet (SMM) in the Coulomb blockade regime taking into account topological interference effects for the tunneling of the large spin of a SMM. The interference originates from spin Berry phases associated with different tunneling paths. We show that, in the case of incoherent spin states, it is essential to place the SMM b...

Percolation quantum phase transitions in diluted magnets.

We show that the interplay of geometric criticality and quantum fluctuations leads to a novel universality class for the percolation quantum phase transition in diluted magnets. All critical exponents involving dynamical correlations are different from the classical percolation values, but in two dimensions they can nonetheless be determined exactly. We develop a complete scaling theory of this...