{"id":85,"date":"2013-12-06T12:23:58","date_gmt":"2013-12-06T12:23:58","guid":{"rendered":"https:\/\/sites.ifi.unicamp.br\/modelo\/?page_id=26"},"modified":"2014-02-24T13:47:46","modified_gmt":"2014-02-24T13:47:46","slug":"pesquisa","status":"publish","type":"page","link":"https:\/\/sites.ifi.unicamp.br\/krpirota\/pesquisa\/","title":{"rendered":"Pesquisa"},"content":{"rendered":"

<\/p>\n

\n
2013 – Atual<\/b><\/div>\n<\/div>\n
\n
Estudo de noos materiais complexos e avan\u00e7ados<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Descri\u00e7\u00e3o: Neste Projeto estamos propondo continuar e aprimorar ainda mais o estudo das propriedades eletr\u00f4nicas, estruturais, magn\u00e9ticas, de transporte e termodin\u00e2micas sob condi\u00e7\u00f5es extremas de altos campos magn\u00e9ticos (d 14 T), altas press\u00f5es (d 30 kbars) e baixas temperaturas (e 50 mK) em sistemas fortemente correlacionados de materiais met\u00e1licos, supercondutores, semimet\u00e1licos, semicondutores, semicondutores magn\u00e9ticos dilu\u00eddos, \u00f3xidos cer\u00e2micos, multiferr\u00f3icos, grafites, grafenos, etc., envolvendo fundamentalmente as intera\u00e7\u00f5es, el\u00e9tron-el\u00e9tron e entre os el\u00e9trons de condu\u00e7\u00e3o com os elementos de transi\u00e7\u00e3o dos grupos 3d do Ferro e 4f das Terras-Raras. Para este fim, experimentos de resistividade el\u00e9trica, efeito Hall, magnetiza\u00e7\u00e3o, susceptibilidade magn\u00e9tica dc\/ac, calor espec\u00edfico, magnetoimped\u00e2ncia, torquimetria, resson\u00e2ncias paramagn\u00e9tica eletr\u00f4nica (EPR), nuclear (RMN) e quadrupolar (RQN), espalhamento Raman, difra\u00e7\u00e3o de raios-X (p\u00f3 e magn\u00e9tica), absor\u00e7\u00e3o de raios-X (XANES, EXAFS, XMCD) e absor\u00e7\u00e3o no infravermelho estar\u00e3o sendo realizados e analizados durante a execu\u00e7\u00e3o deste Projeto em amostras na forma poli\/mono cristalinas, filmes finos, fios, part\u00edculas, multicamadas nanoestruturadas e amorfas. Com o intuito de aprofundar o entendimento dos fen\u00f4menos em estudo, pretendemos com este Projeto Tem\u00e1tico, incorporar ao nosso Grupo as t\u00e9cnicas de RMN\/RQN, EDX, WDS, FT-IR e um forno de l\u00e2mpadas (IR Image Furnace) para a prepara\u00e7\u00e3o de novos \u00f3xidos monocristalinos, necess\u00e1rios para a an\u00e1lise e prepara\u00e7\u00e3o dos novos materiais a serem sintetizados..
\nSitua\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.
\nAlunos envolvidos: Gradua\u00e7\u00e3o: (5) \/ Especializa\u00e7\u00e3o: (0) \/ Mestrado acad\u00eamico: (7) \/ Mestrado profissionalizante: (0) \/ Doutorado: (6) .<\/p>\n

Integrantes: Kleber Roberto Pirota – Integrante \/ Marcelo Knobel – Coordenador \/ Carlos Rettori – Integrante \/ Eduardo Granado – Integrante \/ Pascoal Pagliuso – Integrante \/ Gaston Barberis – Integrante \/ Yakov Kopelevich – Integrante \/ Oscar Ferreira de Lima – Integrante \/ Ricardo Urbano – Integrante.
\nFinanciador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo – Aux\u00edlio financeiro.<\/p><\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2013 – Atual<\/b><\/div>\n<\/div>\n
\n
Coupling effects in magnetic systems of reduced dimensionality<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Descri\u00e7\u00e3o: The main objective of this programme is to achieve a comprehensive knowledge of magnetically coupled systems of reduced dimensionality. Current lithography and production techniques allow the fabrication of magnetic elements with well controlled geometry and dimensions from few nanometers to micron sizes. These dimensions are comparable to some magnetic length scales, such as domain size, domain wall width, spin diffusion length, etc. [1], thus new magnetic behaviours are expected as the material size approaches these physical length scales. Constraining effects have extensively been studied in ferromagnetic materials [2-4]. Spin configurations only possible in such small elements, like single domain, vortex and onion states and head-to-head domain walls have been observed and explained by micromagnetic simulations. However, the spin arrangement of magnetically coupled nanostructures have barely been studied. Many competing parameters affect the final properties, which can strongly depend on temperature, magnetic anisotropies, coupling nature, crystalline structure, exchange interaction, interfacial roughness, geometry, stray field, etc. [5-9]. New properties can emerge from these systems as the dimensions of coupled magnetic elements are reduced, but some intrinsic properties observed in bulk and thin film materials can also disappear at nanometer scales; for example, exchange bias phenomenon is no longer preserved in certain materials as the volume of the element becomes too small. In this project a systematic study of coupling effects will be accomplished in patterned nanostructures with both in-plane and out-of-plane anisotropies. Three kinds of magnetically coupled systems will be investigated: antiferromagnetic \/ ferromagnetic (AF\/FM), hard \/ soft materials and superconducting \/ ferromagnetic (SC\/FM) bilayers. The present project frames into the European FP7th priority programme Nanosciences, Nanotechnologies, Materials and New Production Technologies. Plan.
\nSitua\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.<\/p>\n

Integrantes: Kleber Roberto Pirota – Integrante \/ Rafael Morales – Integrante \/ Javier Villegas – Integrante \/ Josep Nogues – Integrante \/ Xavier Battle – Integrante \/ Carlos Garc\u00eda – Integrante \/ Waldemar Macedo – Integrante \/ Ivan Schuller – Integrante \/ Caroline Ross – Integrante \/ Jos\u00e9 Mec\u00eda L\u00f3pez – Integrante \/ Hernan Pastoriza – Integrante \/ Miguel Kiwi – Integrante.
\nFinanciador(es): Uni\u00e3o Europ\u00e9ia – Aux\u00edlio financeiro.<\/p><\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2012 – 2014<\/b><\/div>\n<\/div>\n
\n
Desenvolvimento de Materiais para Tecnologias de Energias Renov\u00e1veis<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Descri\u00e7\u00e3o: Coopera\u00e7\u00e3o bilateral com M\u00e9xico.
\nSitua\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.<\/p>\n

Integrantes: Kleber Roberto Pirota – Integrante \/ Marcelo Knobel – Coordenador.
\nFinanciador(es): Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico – Aux\u00edlio financeiro.<\/p><\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2012 – Atual<\/b><\/div>\n<\/div>\n
\n
Coupling effects in magnetic patterned nanostructures<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Descri\u00e7\u00e3o: The scientific objective of this programme is to achieve a comprehensive knowledge of magnetically coupled systems of reduced dimensionality. Spin configuration, magnetic and electrical properties of patterned nanostructures will be investigated in three kinds of magnetically coupled materials: antiferromagnetic \/ ferromagnetic (AF\/FM), hard \/ soft materials and superconducting \/ ferromagnetic (SC\/FM) bilayers. Thin films will be patterned constraining lateral dimensions in the range of 50 nm to 200 microns. These dimensions are comparable to typical magnetic length scales as domain wall width and spin diffusion length, thus novel phenomena and spin configurations are expected as the size of these elements becomes smaller. Coupling interactions in patterned magnetic systems have attracted much attention due to both still open challenging issues in nanomagnetism and the technological implications in spintronics devices, storage media, biological sensor, and logic units. Four Work packages reveal the challenges and objectives of this proposal. The effect of magnetic coupling in: i) the formation of a vortex state in dots with an in-depth magnetic profile (FeF2\/FeNi), ii) competing anisotropy nanostructures (IrMn\/FeCo), iii) the domain configuration in YBaCuO\/FM hybrid heterostructures, and iv) the stability of CoCrPt\/Ni3 nanoelements with perpendicular anisotropy, will be systematically investigated. The proposed exchange scheme will train young and experienced researchers from eleven highclass research centers in state-of-the-art nanofabrication and characterization techniques. The success of this project is only possible combining capacities and facilities from all partners..
\nSitua\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.
\nAlunos envolvidos: Gradua\u00e7\u00e3o: (10) \/ Mestrado acad\u00eamico: (5) \/ Doutorado: (20) .<\/p>\n

Integrantes: Kleber Roberto Pirota – Coordenador.<\/p><\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2011 – 2012<\/b><\/div>\n<\/div>\n
\n
S\u00edntesis y caracterizaci\u00f3n de nanomateriales para aplicaciones en tecnologia de sensores y biomedicina<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Em andamento; Natureza: Pesquisa. Financiador(es): Banco Santander Banespa – Brasil – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2011 – 2011<\/b><\/div>\n<\/div>\n
\n
Medidas de resson\u00e2ncia ferromagn\u00e9tica e absor\u00e7\u00e3o de microondas em nanoestruturas magn\u00e9ticas ordenadas de “antidots”<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa. Financiador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2010 – 2011<\/b><\/div>\n<\/div>\n
\n
Prepara\u00e7\u00e3o e estudos de nanofios magn\u00e9ticos nanoestruturados<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.
\nAlunos envolvidos: Gradua\u00e7\u00e3o: (2) \/ Mestrado acad\u00eamico: (2) \/ Doutorado: (1) .<\/p>\n

Integrantes: Kleber Roberto Pirota – Coordenador \/ Leandro Socolovsky – Integrante.
\nFinanciador(es): Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior – Aux\u00edlio financeiro.<\/p><\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2009 – 2012<\/b><\/div>\n<\/div>\n
\n
Fabrica\u00e7\u00e3o e caracteriza\u00e7\u00e3o de nanoestruturas magn\u00e9ticas ordenadas<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa. Financiador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2009 – 2010<\/b><\/div>\n<\/div>\n
\n
Funcionalizaci\u00f3n de materiales para biodetecci\u00f3n<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Em andamento; Natureza: Pesquisa.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2009 – 2010<\/b><\/div>\n<\/div>\n
\n
Fabrica\u00e7\u00e3o e caracteriza\u00e7\u00e3o de nanoestruturas magn\u00e9ticas<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa. Financiador(es): Universidade Estadual de Campinas – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2007 – 2011<\/b><\/div>\n<\/div>\n
\n
Estudo de sistemas fortemente correlacionados em condi\u00e7\u00f5es extremas<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Descri\u00e7\u00e3o: Neste Projeto estamos propondo o estudo das propriedades eletr\u00f4nicas, estruturais, magn\u00e9ticas, de transporte e termodin\u00e2micas de sistemas altamente correlacionados sob condi\u00e7\u00f5es extremas de altos campos magn\u00e9ticos (at\u00e9 14 T), altas press\u00f5es (at\u00e9 30 kbars) e baixas temperaturas (a partir de 50 mK) em mat\u00e9rias semicondutores, met\u00e1licos, semimet\u00e1licos, semicondutores magn\u00e9ticos dilu\u00eddos, \u00f3xidos cer\u00e2micos, multiferr\u00f3icos, grafites etc., envolvendo fundamentalmente as intera\u00e7\u00f5es, el\u00e9tron-el\u00e9tron e entre os el\u00e9trons de condu\u00e7\u00e3o com os elementos de transi\u00e7\u00e3o dos grupos 3d do ferro e 4f das Terras-Raras. Para este fim, experimentos de resistividade, efeito Hall, magnetiza\u00e7\u00e3o, susceptibilidade magn\u00e9tica dc\/ac, calor espec\u00edfico, magnetoimped\u00e2ncia, torquimetria, resson\u00e2ncia paramagn\u00e9tica eletr\u00f4nica (EPR), espalhamento Raman, difra\u00e7\u00e3o de p\u00f3, difra\u00e7\u00e3o magn\u00e9tica e absor\u00e7\u00e3o de raios-X (XANES, EXAFS, XMCD) em amostras na forma poli e monocristalinas, filmes finos, fios, part\u00edculas, multicapas nanoestruturadas e amorfas estar\u00e3o sendo realizados e analisados durante a execu\u00e7\u00e3o deste projeto..
\nSitua\u00e7\u00e3o: Em andamento; Natureza: Pesquisa. Financiador(es): Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/a><\/p>\n

\n
2007 – 2009<\/b><\/div>\n<\/div>\n
\n
S\u00edntesis y caracterizaci\u00f3n de recubrimientos nanoestrucutrados.<\/div>\n<\/div>\n
\n
\u00a0<\/b><\/div>\n<\/div>\n
\n
Situa\u00e7\u00e3o: Conclu\u00eddo; Natureza: Pesquisa. Financiador(es): Comunidad Aut\u00f3noma de Madrid – Aux\u00edlio financeiro.<\/div>\n<\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

2013 – Atual Estudo de noos materiais complexos e avan\u00e7ados \u00a0 Descri\u00e7\u00e3o: Neste Projeto estamos propondo continuar e aprimorar ainda mais o estudo das propriedades eletr\u00f4nicas, estruturais, magn\u00e9ticas, de transporte e termodin\u00e2micas sob condi\u00e7\u00f5es extremas de altos campos magn\u00e9ticos (d 14 T), altas press\u00f5es (d 30 kbars) e baixas temperaturas (e 50 mK) em sistemas … <\/p>\n

Continue lendo<\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-85","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/pages\/85","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/comments?post=85"}],"version-history":[{"count":1,"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/pages\/85\/revisions"}],"predecessor-version":[{"id":133,"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/pages\/85\/revisions\/133"}],"wp:attachment":[{"href":"https:\/\/sites.ifi.unicamp.br\/krpirota\/wp-json\/wp\/v2\/media?parent=85"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}