Lambda (λ) Transition in the Heat Capacity by Finite Block Spin Phenomenology
| Autor: | Kwang Sei Lee, Je Huan Koo, Cheol Eui Lee |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Spins Condensed matter physics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Lambda 01 natural sciences Heat capacity Curie's law Paramagnetism 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Brillouin and Langevin functions 0210 nano-technology Néel temperature |
| Zdroj: | Journal of the Korean Physical Society. 74:1085-1088 |
| ISSN: | 1976-8524 0374-4884 |
| DOI: | 10.3938/jkps.74.1085 |
| Popis: | We explain the lambda (λ) transition in the heat capacity in terms of spin freezing on the basis of finite-sized block spin concepts. Thus, the spin-glass phase or the antiferromagnetic/paramagnetic phase near the Neel temperature may be considered as a short-range ordering of the block spins comprised of many random spins with respective majority spin directions. Using the Curie law for the block spins, we obtain the λ-type heat capacity in the lower and the higher temperature approximations of the Brillouin function. The theoretical heat capacity gives a good fit to the experimental data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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