Zobrazeno 1 - 10
of 55
pro vyhledávání: '"F M Zimmer"'
In this work, we theoretically demonstrate that a strong enhancement of the Magnetocaloric Effect is achieved in geometrically frustrated cluster spin-glass systems just above the freezing temperature. We consider a network of clusters interacting ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38f0efdb12cdc9b5850c6e340dd2388f
http://arxiv.org/abs/2304.10449
http://arxiv.org/abs/2304.10449
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 516:464-471
We study a disordered antiferromagnetic system with the focus on the magnetic-field-induced spin glass behavior. To this purpose, we consider a van Hemmen type of disordered coupling among clusters of spins and nearest-neighbor antiferromagnetic exch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84acf15118288dbe328d5f36ec3aca90
https://doi.org/10.1016/j.physa.2018.10.040
https://doi.org/10.1016/j.physa.2018.10.040
Publikováno v:
Physical review. E. 103(3-1)
We study a recently proposed spin-1 model with competing antiferromagnetic first-neighbor interaction and a third-neighbor coupling mediated by nonmagnetic states, which reproduces topological features of the phase diagrams of high-T_{c} superconduct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4c105b5d3163a1471283b3fe65d95d0
https://pubmed.ncbi.nlm.nih.gov/33862719
https://pubmed.ncbi.nlm.nih.gov/33862719
Publikováno v:
Physical Review E. 102
We investigate a disordered cluster Ising antiferromagnet in the presence of a transverse field. By adopting a replica cluster mean-field framework, we analyze the role of quantum fluctuations in a model with competing short-range antiferromagnetic a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbbc0943074ea26a59755b5fb96184f1
https://doi.org/10.1103/physreve.102.032139
https://doi.org/10.1103/physreve.102.032139
Publikováno v:
Journal of Magnetism and Magnetic Materials. 449:440-446
We consider a cluster disordered model to study the interplay between short- and long-range interactions in geometrically frustrated spin systems under an external magnetic field ( h ). In our approach, the intercluster long-range disorder ( J ) is a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eab9d28cec6d9829add80ac63903416
https://doi.org/10.1016/j.jmmm.2017.10.079
https://doi.org/10.1016/j.jmmm.2017.10.079
Publikováno v:
Philosophical Magazine. 97:2347-2360
The van Hemmen Fermionic Ising Spin Glass (vH FISG) model in the presence of a transverse and a random magnetic field is adopted to study the inverse freezing (IF) transition, without using the replica method to treat the disorder. In this model, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f8464024dd8ba2dbea0de087ef533d5
https://doi.org/10.1080/14786435.2017.1332433
https://doi.org/10.1080/14786435.2017.1332433
Publikováno v:
Physical Review E. 99
We investigate the role of a transverse field on the Ising square antiferromagnet with first-($J_1$) and second-($J_2$) neighbor interactions. Using a cluster mean-field approach, we provide a telltale characterization of the frustration effects on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d971a867b6aa998eec772a0d1289ec09
https://doi.org/10.1103/physreve.99.012134
https://doi.org/10.1103/physreve.99.012134
Publikováno v:
Physical Review B. 99
We study magnetic properties of spin glass SG systems under a random field (RF), beased on the suggestion that RFs can be induced by a weak transverse field in the compound LiHo$_x$Y$_{1-x}$F$_4$. We consider a cluster spin model that allows long-ran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a1a1797a2a306bc581c4e63646bbae5
https://doi.org/10.1103/physrevb.99.014203
https://doi.org/10.1103/physrevb.99.014203
Publikováno v:
Physics Letters A. 384:126687
We investigate the phase transitions in the Ising model on a layered square lattice with first-( J 1 ) and second-( J 2 ) neighbor intralayer interactions and interlayer couplings (J). The thermodynamics of the system is evaluated within a cluster me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b8f69e579725bd94eea5d152dd2ac42
https://doi.org/10.1016/j.physleta.2020.126687
https://doi.org/10.1016/j.physleta.2020.126687
The interplay between geometric frustration (GF) and bond disorder is studied in the Ising kagome lattice within a cluster approach. The model considers antiferromagnetic (AF) short-range couplings and long-range intercluster disordered interactions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23d6dbda2f644249e7e515fbf0c36715
http://arxiv.org/abs/1702.05048
http://arxiv.org/abs/1702.05048