Theoretical investigation of compensation point phenomena in a ferrimagnetic mixed spin-3/2 and spin-1 Ising nanoparticle

ABSTRACT

We have explored some magnetic characteristics of a mixed spin-3/2 and spin-1 Ising ferrimagnetic square nanoparticle by utilising the finite cluster approximation. The influences of the core and surface shell couplings (J_c, J_s), as well as the crystal fields (D_c, D_s) on the critical and compensation behaviour, were investigated. In the absence of crystal fields, a compensation point only exists if J_c is higher than the threshold core coupling J*_c, where the dependence of J*_c on J_s is linear. By introducing the crystal fields, we found a variety of topologies of the compensation temperature with the possibility of double reentrance. In particular, the presence of the core crystal field D_c, according to the J_s strength, may lead to one, two, or three compensation points.

KEYWORDS:

• Mixed spin Ising
• ferrimagnetic nanoparticle
• compensation point
• crystal field
• Finite cluster approximation

Disclosure statement

No potential conflict of interest was reported by the author(s).