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| Title: | MAGNETIC FIELD EFFECTS ON THERMAL FLUCTUATIONS OF CLUSTER MAGNETIC MOMENTS | |
| DOI No: | 10.1142/9789812701879_0026 | |
| Source: | CLUSTERS AND NANO-ASSEMBLIES (pp 223-230) | |
| Author(s): | KEYUR DESAI
Work partially supported by the Center for Fundamental Materials Research at Michigan State University. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Department of Electrical & Computer Eng., Michigan State University, East Lansing, MI 48824, USA S. D. MAHANTI Work partially supported by the Center for Fundamental Materials Research at Michigan State University. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA S. N. KHANNA SNK was partially supported from the Department of Energy (#DE-FG02-96ER45579). Department of Physics, Virginia Commonwealth University, Richmond, VA 23284, USA |
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| Abstract: | We have investigated the effects of magnetic field and temperature on the average magnetic moment of Gd13 atomic clusters using a classical Heisenberg model with competing interactions between atomic spins  . Monte Carlo simulations were carried out at different temperatures (T) and field strengths (B) to obtain  and M2 = ∑i ⟨ Siz ⟩, where the external magnetic field is along the z-direction. In the limit of vanishing B, the relationship between M2 and M1 was checked against fluctuation-dissipation theorem and its implication on the extraction of the temperature dependence of cluster magnetic moments in Stern-Gerlach measurements was investigated. |
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