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Long-Range Effects in Layered Spin Structures

Long-Range Effects in Layered Spin Structures. Ramaz Khomeriki 1,3 , David Mukamel 2 , Stefano Ruffo 1. 1) Dipartimento di Energetica ‘‘S. Stecco’’ and CSDC, Università di Firenze, and INFN, Via S. Marta, 3, 50139 Firenze, ITALY

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Long-Range Effects in Layered Spin Structures

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  1. Long-Range Effects in Layered Spin Structures Ramaz Khomeriki1,3, David Mukamel2, Stefano Ruffo1 1)Dipartimento di Energetica ‘‘S. Stecco’’ and CSDC, Università di Firenze, and INFN, Via S. Marta, 3, 50139 Firenze, ITALY 2)Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, ISRAEL 3)Physics Department, Tbilisi State University, 0128 Tbilisi, GEORGIA

  2. A B S T R A C T The layered spin structures are studied theoretically with the aim of predicting realistic testable effects of long range dipolar interactions. As shown, dipolar in-teraction between the spin layers open gaps in allowa-ble energy versus magnetization phase diagram. The consequences of this behavior, particularly, the respo-nse of the system state under application of periodical external magnetic field is investigated.

  3. CLASSICAL SPIN CHAINS L.J. de Jongh, A.R. Miedema, Adv. Phys., 23, 1, (1974). A. Dupas, K. Le Dang, J.-P. Renard, P. Veillet, J. Phys. C: Solid State Phys., 10, 3399, (1977). n=1 Ferromagnetic chain n=2 Antiferromagnetic chain x z y

  4. L. Q. English, M. Sato, and A. J. Sievers, Phys. Rev. E, 67, 024403 (2003). M. Sato, L. Q. English, B. E. Hubbard, A. J. Sievers, J. Appl. Phys., 10, 8676, (2002). M. Sato, A. J. Sievers, Nature,432, 486 (2004). Bx =4W(1-x)>0;

  5. A. Dupas, K. Le Dang, J.-P. Renard, P. Veillet, J. Phys. C: Solid State Phys., 10, 3399, (1977).

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