中国物理B ›› 1999, Vol. 8 ›› Issue (3): 199-207.doi: 10.1088/1004-423X/8/3/007

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TEMPERATURE DEPENDENCES OF THE ORDER PARAMETERS OF A MAGNETIC ISING SUPERLATTICE OF TWO FERROMAGNET MATERIALS WITH SPINS μ=1/2 and S=1

B. Laaboudi1, A. Benaboud1, M. Kerouad1, M. Saber2   

  1. (1)Département de physique, Faculté des Sciences, Université Moulay Ismail, B. P. 4010, Meknès, Morocco.; (2)Département de physique, Faculté des Sciences, Université Moulay Ismail, B. P. 4010, Meknès, Morocco; Abdus Salam International Center for Theoretical Physics, Trieste, Italy.
  • 收稿日期:1998-09-01 出版日期:1999-03-15 发布日期:1999-03-20

TEMPERATURE DEPENDENCES OF THE ORDER PARAMETERS OF A MAGNETIC ISING SUPERLATTICE OF TWO FERROMAGNET MATERIALS WITH SPINS $\mu$=1/2 and S=1

B. Laaboudia, M. Saberab, A. Benabouda, M. Kerouada   

  1. a Département de physique, Faculté des Sciences, Université Moulay Ismail, B. P. 4010, Meknès, Morocco.; b Abdus Salam International Center for Theoretical Physics, Trieste, Italy.
  • Received:1998-09-01 Online:1999-03-15 Published:1999-03-20

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摘要： The temperature dependences of the layer parameters $\sigma_{n, z}=<\mu_{n, z}>, m_{n, z}=<S_{n, z}>$ and $q_{n, z}=\left\langle S_{n, z}^{2}\right\rangle$ of a magnetic Ising superlattice consisting of two ferromagnetic Ising materials with spins $\mu=1/2$ and S=1 respectively, on a simple cubic structure, are examined using the effective field theory based on the use of a probability distribution technique that correctly accounts for the single site kinematic relations. According to the values of the exchange interactions, different qualitative types of phase diagrams are expected.

Abstract: The temperature dependences of the layer parameters $\sigma$ n, z = <$\mu$n, z>, mn, z=<Sn, z> and qn,z=<Sn,z2> of a magnetic Ising superlattice consisting of two ferromagnetic Ising materials with spins $\mu=1/2$ and S =1 respectively, on a simple cubic structure, are examined using the effective field theory based on the use of a probability distribution technique that correctly accounts for the single site kinematic relations. According to the values of the exchange interactions, different qualitative types of phase diagrams are expected.

中图分类号:  (Classical spin models)

  • 75.10.Hk
75.50.Dd (Nonmetallic ferromagnetic materials) 75.30.Et (Exchange and superexchange interactions) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))