Green function study of a mixed spin-2 and spin-5/2 Heisenberg ferrimagnetic system on a honeycomb lattice

2003 ◽  
Vol 238 (1) ◽  
pp. 191-197 ◽  
Author(s):  
Jun Li ◽  
An Du ◽  
Guozhu Wei
2007 ◽  
Vol 21 (07) ◽  
pp. 1077-1087 ◽  
Author(s):  
JUN LI ◽  
AN DU ◽  
GUOZHU WEI

The magnetic properties of a mixed spin-2 and spin-5 / 2 Heisenberg ferrimagnetic system on a layered honeycomb lattice are investigated theoretically by a multisublattice Green-function technique which takes into account the quantum nature of Heisenberg spins. We calculate the magnetization and the compensation temperature and transition temperature of the system in an external magnetic field and in a zero external magnetic field, and find that the transition temperature of the system increases on the effect of an external magnetic field, the compensation point disappears when the single-ion anisotropy is not large and there are two compensation points when the anisotropy is large. We also calculate the initial susceptibilities of the system.


1994 ◽  
Vol 131 (1-2) ◽  
pp. 173-178 ◽  
Author(s):  
A. Benyoussef ◽  
A. El Kenz ◽  
T. Kaneyoshi
Keyword(s):  

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
Jordana Torrico ◽  
Jozef Strečka ◽  
Onofre Rojas ◽  
Sergio Martins de Souza ◽  
Marcelo Leite Lyra

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