Lambda () Transition in the Heat Capacity by Finite Block Spin Phenomenology
- Authors
- Lee, Kwang-Sei; Koo, Je Huan; Lee, Cheol Eui
- Issue Date
- 6월-2019
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Heat capacity; N ' eel temperature; Lambda () transition; Antiferromagnetic phase transition
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.74, no.11, pp.1085 - 1088
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 74
- Number
- 11
- Start Page
- 1085
- End Page
- 1088
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/65323
- DOI
- 10.3938/jkps.74.1085
- ISSN
- 0374-4884
- Abstract
- We explain the lambda () 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 -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.
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