Magnetic Properties of a Transverse Ising Nanoparticle
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We use the effective field theory with a probability distribution technique to investigate the magnetic properties of an antiferromagnetic Ising core/shell nanoparticle with a negative interlayer coupling core/shell in the presence of both the longitudinal and the transverse fields. Nearest-neighbor pair interactions are incorporated between the Ising spins in three parts that are core, core/shell, and surface shell. The effects of the external and the transverse fields and the exchange interactions between core/shell and in surface shell on the hysteresis loops and the susceptibility of the nanoparticle are examined. A number of interesting phenomena have been found.
KeywordsEffective field theory Antiferromagnetic nanoparticle Hysteresis loops Transverse field
This work has been initiated with the support of URAC: 08, the project RS: 02 (CNRST) and the Swedish Research Links programme dnr-348-2011-7264 and completed during a visit of A. A at the Max Planck Institut für Physik Komplexer Systeme Dresden, Germany. The authors would like to thank all the organizations.
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