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Evidence of Verwey transition in iron- and iron oxide-encapsulated carbon nanotubes |
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| Authors: | AEP de Araújo JGS Duque M Knobel MC Schnitzler AJG Zarbin |
| Institution: | 1. Unidade Acadêmica de Garanhuns, UFRPE, CEP 55296-190, Garanhuns-PE, Brazil;2. Departamento de Física da Matéria Condensada, UNICAMP CP 6165 CEP 13085-970, Campinas-SP, Brazil;3. Departamento de Química—UFPR CP 19081, CEP 81531-990, Curitiba-PR, Brazil |
| Abstract: | Magnetization measurements in two different samples of iron- and iron oxide-encapsulated carbon nanotubes are presented. The samples showed coercivity smaller than 1 kOe. The dependence of the coercivity with the temperature has an abrupt change at temperatures close to 125 K. In this temperature the ZFC and FC magnetization curves also present an abrupt change. This effect is attributed to a Verwey transition. |
| Keywords: | 73 20 Mf 73 50 &minus h 79 60 Jv |
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