Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
S. COJOCARU1,*
Saturation magnetization of nanosize ferromagnets (nanoparticles and nanoclusters) does not follow the Bloch T3/2 law, known to be valid for macroscopic materials. In the absence of the „small size” formula of magnetization one usually uses a phenomenological power law Tα with a size dependent exponent α , which is motivated simply by its flexibility in fitting the observed behavior. We argue on the inconsistency of such a desciption and present an analytic derivation of the respective expression for magnetization in which generalizes the Bloch formula to a finite size system. Comparison to the experimental data on nanoclusters and nanoparticles demonstrates a good agreement with this expression and its utility for a better understanding of the underlying physics..
Magnon gas, Nanomagnets, Bloch law.
S. COJOCARU, Temperature dependence of magnetization of a nanosize Heisenberg ferromagnet, Optoelectronics and Advanced Materials - Rapid Communications, 5, 11, November 2011, pp.1196-1201 (2011).
Submitted at: June 22, 2011
Accepted at: Nov. 23, 2011
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.