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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/56880
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dc.creatorCynthia Paola Contreras Medranopt_BR
dc.creatorDaniele Cristina Silva de Freitaspt_BR
dc.creatorEdson Passamani Caetanopt_BR
dc.creatorCarlos Basílio Pinheiropt_BR
dc.creatorElisa Maria Baggio Saitovitchpt_BR
dc.creatorMucio Amado Continentinopt_BR
dc.creatorDalber Ruben Sanchez Candelapt_BR
dc.date.accessioned2023-07-24T14:58:10Z-
dc.date.available2023-07-24T14:58:10Z-
dc.date.issued2017-
dc.citation.volume95pt_BR
dc.citation.issue21pt_BR
dc.citation.spage214419-1pt_BR
dc.citation.epage214419-6pt_BR
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.95.214419pt_BR
dc.identifier.issn2469-9969pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/56880-
dc.description.resumoThis paper presents an extensive study of the structural, magnetic, and thermodynamic properties of the heterometallic ludwigite Co4.76 Al 1.24 (O2 BO3 ) 2 . This material orders ferrimagnetically at 57 K. Despite the fact that, in Co4.76 Al 1.24 (O2 BO3 ) 2 , one quarter of the Co ions of the parent compound Co3 O2 BO3 is replaced by nonmagnetic Al 3+ ions, the TC of the former (57 K) is larger than that of the latter (42 K). We obtain the phase diagram of Co4.76 Al 1.24 (O2 BO3 ) 2 in an external magnetic field. We find a line of second-order phase transitions where the system presents a metamagnetic transition (from 57 to 25 K). This line ends at a tricritical point at 25 K and 4.3 T, below which the transition to the paramagnetic phase is first order (from 25 to 3 K). In the magnetic phase at low temperatures specific heat measurements in zero and finite magnetic fields show that the low-energy excitations are magnetic (magnons) and elastic (phonons) excitations with two-dimensional character. These measurements also reveal the magnetocaloric properties of this material.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPERJ - Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiropt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPhysical Review B-
dc.rightsAcesso Restritopt_BR
dc.subjectHeterometallic ludwigitept_BR
dc.subjectPhase transitionspt_BR
dc.subjectAntiferromagnetismpt_BR
dc.subject.otherAntiferromagnetismopt_BR
dc.subject.otherTransições de fasespt_BR
dc.titleField-induced metamagnetic transitions and two-dimensional excitations in ludwigite Co4.76Al1.24(O2BO3)2pt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.214419pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2565-0304pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1310-2749pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-8674-1779pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-4082-8585pt_BR
dc.identifier.orcidhttp://orcid.org/0000-0003-0167-8529pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-4253-9031pt_BR
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