| dc.creator | Salcedo Rodríguez, Karen Lizeth | |
| dc.creator | Stewart, Silvana Jacqueline | |
| dc.creator | Mendoza Zélis, Pedro | |
| dc.creator | Pasquevich, Gustavo Alberto | |
| dc.creator | Rodríguez Torres, Claudia Elena | |
| dc.date | 2018-04 | |
| dc.date | 2020-05-28T13:12:06Z | |
| dc.date.accessioned | 2023-07-14T20:10:41Z | |
| dc.date.available | 2023-07-14T20:10:41Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/96885 | |
| dc.identifier | https://ri.conicet.gov.ar/11336/87528 | |
| dc.identifier | issn:0925-8388 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7438206 | |
| dc.description | Defective zinc ferrites ZnFe2O4-δ obtained by vacuum annealing bulk Zn-ferrite at different temperatures TAnn were investigated by using XANES at Zn-K, Fe-K and XMCD at Fe-L2,3 edges, static and dynamic magnetic measurements. The cation inversion that confers to the starting ferrite a weak ferromagnetic response is progressively lost when TAnn surpasses 250 °C. Consequently, there is a detriment of the magnetic response that reaches its lower value for TAnn around 370 °C, being the latter coincident with a negligible non-equilibrium occupancy. Above TAnñ 450 °C the ferrite progressively enhances its magnetic response. In such case, even though Zn and Fe occupy non-equilibrium sites at surface regions, the deficiency of oxygen predominates over inversion and the former triggers an increment of the magnetic coupling between Fe3+ at octahedral spinel sites. We discuss the magnetic results that account for spin-glass and/or cluster-glass behavior of this geometrically frustrated compound as due to the randomness and frustration introduced by local defects. | |
| dc.description | Instituto de Física La Plata | |
| dc.format | application/pdf | |
| dc.format | 289-295 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Física | |
| dc.subject | Zinc ferrite | |
| dc.subject | Pyrochlore | |
| dc.subject | Geometrically frustrated spinel | |
| dc.subject | Cluster glass | |
| dc.title | Role of defects on the magnetic behaviour of the geometrically frustrated spinel ZnFe2O4 | |
| dc.type | Articulo | |
| dc.type | Preprint | |
