Effect of a magnetic field in an S = 1 antiferromagnetic chain with single-ion anisotropy and alternating bonds with disorder
| Autor: | N. S. Branco, E.A. Cotta, Jonathas N. Silva, H.D. Fonseca Filho, Octavio D. Rodriguez Salmon, Minos A. Neto |
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| Přispěvatelé: | Univ Fed Amazonas, Universidade Federal de Santa Catarina (UFSC), Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Partition function (statistical mechanics) Condensed matter physics 02 engineering and technology General Chemistry Low-dimensional system 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Transfer matrix Super-lattice chain 0104 chemical sciences Magnetic field Single-ion anisotropy Magnetization symbols.namesake Magnetization plateau symbols Antiferromagnetism General Materials Science 0210 nano-technology Anisotropy Hamiltonian (quantum mechanics) Spin-½ |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2021.109988 |
| Popis: | Made available in DSpace on 2021-06-25T11:55:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-05-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) FAPEAM this study, we investigated the quantization of magnetization at low temperatures in a spin-1 antiferromagnetic chain with single-ion anisotropy by considering the quenched disorder in alternating bonds. Each spin i interacts with its nearest neighbors via J(i) and alpha J(i) couplings, where J(i) is considered to obey a Gaussian or Bernoulli probability distribution function, with width sigma. Zero temperature phase diagrams were obtained by minimizing the energy of the Hamiltonian. For finite temperatures, a transfer matrix technique was applied in order to treat the partition function. Consequently, the magnetization curve calculated by deriving the quenched average of the free energy exhibited interesting plateaus, which were modified when randomness was considered. Experimentally, these plateaus appear when some chain structures are subjected to a magnetic field. Univ Fed Amazonas, Dept Fis, 3000 Japiim, BR-69077000 Manaus, Amazonas, Brazil Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil Univ Fed Amazonas, Dept Fis, Opt Lab, 3000 Japiim, BR-69077000 Manaus, Amazonas, Brazil Univ Estadual Paulista, BR-14800901 Araraquara, SP, Brazil Univ Estadual Paulista, BR-14800901 Araraquara, SP, Brazil CNPq: 408787/2018-0 CNPq: 306569/2018-3 CNPq: 407462/2018-0 |
| Databáze: | OpenAIRE |
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