Properties of highly frustrated magnetic molecules studied by the finite-temperature Lanczos method |
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Authors: | B S Kandemir and A Mogulkoc |
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Institution: | 1.Department of Physics,Faculty of Sciences, Ankara University,Tando?an, Ankara,Turkey |
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Abstract: | The very interesting magnetic properties of frustrated magnetic molecules are often hardly
accessible due to the prohibitive size of the related Hilbert spaces. The finite-temperature Lanczos
method is able to treat spin systems for Hilbert space sizes up to 109. Here we first demonstrate
for exactly solvable systems that the method is indeed accurate. Then we discuss the thermal
properties of one of the biggest magnetic molecules synthesized to date, the icosidodecahedron with
antiferromagnetically coupled spins of s = 1/2. We show how genuine quantum features such as the
magnetization plateau behave as a function of temperature. |
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