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Статті в журналах з теми "Magnetocaloric effect, phase transition, magnetic refrigeration"
Albertini, Franca, Massimo Solzi, Antonio Paoluzi, and Lara Righi. "Magnetocaloric Properties and Magnetic Anisotropy by Tailoring Phase Transitions in NiMnGa Alloys." Materials Science Forum 583 (May 2008): 169–96. http://dx.doi.org/10.4028/www.scientific.net/msf.583.169.
Повний текст джерелаWang, Gao Feng, Zeng Ru Zhao, Xiao Bin Zhang, and Xue Feng Zhang. "First-Order Phase Transition and Magnetocaloric Effect of MnFeP0.63Ge0.12Si0.25 Compound." Advanced Materials Research 1053 (October 2014): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.37.
Повний текст джерелаLiu, Quanyi, Zhaojun Mo, Huicai Xie, Qi Fu, Jun Shen, and Jinliang Zhao. "Magnetic properties and cryogenic magnetocaloric effect in monoclinic RE8.66(BO3)2(B2O5)O8 (RE = Er, Tm) compounds." Journal of Applied Physics 133, no. 1 (January 7, 2023): 013902. http://dx.doi.org/10.1063/5.0129082.
Повний текст джерелаGao, Li, Ying Feng, Shaohui Hu, and Xiangyang Xin. "Magnetostructural Transition and Magnetocaloric Effect with Negligible Magnetic Hysteresis in MnCoGe1.02−xGax Alloys." Metals 12, no. 7 (July 5, 2022): 1143. http://dx.doi.org/10.3390/met12071143.
Повний текст джерелаPecharsky, Vitalij K., Jun Cui, and Duane D. Johnson. "(Magneto)caloric refrigeration: is there light at the end of the tunnel?" Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2074 (August 13, 2016): 20150305. http://dx.doi.org/10.1098/rsta.2015.0305.
Повний текст джерелаМирошкина, О. Н., В. В. Соколовский, М. А. Загребин, С. В. Таскаев та В. Д. Бучельников. "Теоретический подход к исследованию магнитных и магнитокалорических свойств сплавов Гейслера Ni-Mn-Ga". Физика твердого тела 62, № 5 (2020): 697. http://dx.doi.org/10.21883/ftt.2020.05.49232.22m.
Повний текст джерелаSong, Zhao, Zongbin Li, Bo Yang, Haile Yan, Claude Esling, Xiang Zhao, and Liang Zuo. "Large Low-Field Reversible Magnetocaloric Effect in Itinerant-Electron Hf1−xTaxFe2 Alloys." Materials 14, no. 18 (September 11, 2021): 5233. http://dx.doi.org/10.3390/ma14185233.
Повний текст джерелаSechovský, Vladimír, Denys Vasylyev, and Jan Prokleška. "Magnetocaloric and Thermal Properties of Ho(Co1–xSix)2 Compounds." Zeitschrift für Naturforschung B 62, no. 7 (July 1, 2007): 965–70. http://dx.doi.org/10.1515/znb-2007-0714.
Повний текст джерелаJing, Chao, X. L. Wang, D. H. Yu, Y. J. Yang, B. J. Kang, S. X. Cao, J. C. Zhang, Z. Li, J. Zhu, and B. Lu. "Magnetic Phase Transitions and Magnetocaloric Properties of Gd5Si0.4In3.6 Compound." Applied Mechanics and Materials 320 (May 2013): 67–71. http://dx.doi.org/10.4028/www.scientific.net/amm.320.67.
Повний текст джерелаQiao, Kaiming, Yuhang Liang, Shulan Zuo, Cheng Zhang, Ziyuan Yu, Yi Long, Fengxia Hu, Baogen Shen, and Hu Zhang. "Regulation of Magnetocaloric Effect in Ni40Co10Mn40Sn10 Alloys by Using a Homemade Uniaxial Strain Pressure Cell." Materials 15, no. 12 (June 18, 2022): 4331. http://dx.doi.org/10.3390/ma15124331.
Повний текст джерелаДисертації з теми "Magnetocaloric effect, phase transition, magnetic refrigeration"
Quetz, Abdiel. "EXPLORATION OF NEW MAGNETOCALORIC AND MULTIFUNCTIONAL MAGNETIC MATERIALS." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1378.
Повний текст джерелаBENNATI, CECILIA. "Physical behaviour and properties at the first order phase transition of magnetocaloric materials." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2652204.
Повний текст джерелаAryal, Anil. "EXPLORATION OF NOVEL MAGNETOCALORIC MATERIALS FOR APPLICATIONS IN MAGNETIC COOLING TECHNOLOGY." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1813.
Повний текст джерелаPhejar, Mathieu. "Étude de nouveaux matériaux de type La(Fe1-xSix)13 pour la réfrigération magnétique à température ambiante." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00601081.
Повний текст джерелаBauer, Christopher. "Magnetocaloric Effect in Thin Films and Heterostructures." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3003.
Повний текст джерелаDas, Ranjit Chandra. "The Effect of Stoichiometric Variation on the Magnetocaloric Properties of Selected Mn-Fe-Ni-Si-Al Intermetallic Compounds." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1626959102771612.
Повний текст джерелаMboukam, Jean Jules. "Magnetocaloric effect and critical behaviour near the magnetic phase transition temperature in rare-earth compounds." University of the Western Cape, 2018. http://hdl.handle.net/11394/6218.
Повний текст джерелаRare-earth intermetallic compounds continue to draw considerable attention, due to their fundamental importance in understanding physical properties and potential applications based on a variety of phenomena. The focus of this project is to employ two family of rare-earth intermetallic compounds: RE2Pt2In (RE = Pr, Nd) and RE8Pd24Ga (RE = Gd, Tb, Dy) ternary intermetallic systems as a model candidate to uncover the underlying ground state properties that result in a strong coupling between the conduction electron and the 4f-electron of the rare-earth ions.
Akintunde, Babajide O. "A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami16267284137581.
Повний текст джерелаCaron, Luana. "Da síntese e do efeito magnetocalórico de compostos derivados do Fe2P, Mn2Sb e MnAs." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277089.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
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Resumo: Nesta tese de doutoramento são apresentados os resultados do estudo das propriedades magnéticas, magnetocalóricas e estruturais de algumas séries de compostos que são de interesse para aplicação em refrigeração magnética baseada no efeito magnetocalórico. Os métodos de preparação da série MnFe P1-xAsx são estudados de forma a otimizar o tempo de preparação e as propriedades magnétocalóricas. Uma nova série de compostos baseada na anterior, a MnFeGe1-xSix foi descoberta, apresentando transições de fase magnética de segunda ordem e uma variação linear dos parâmetros de rede em função da concentração de Si no intervalo 0 £ x £ 0,7. Também foi descoberto, associado à uma transição magnética de segunda ordem, o efeito magnetocalórico no composto MnFeSn cujo TC situa-se em torno da temperatura ambiente. Foi feito o estudo do efeito magnetocalórico dos compostos baseados no Mn2Sb com o Mn parcialmente substituído por Cr, V, Co e Cu e o Sb substituído por Ge. Nestes compostos uma transição do tipo Exchange Inversion é induzida pelas substituições, transformando o estado ferrimagnético em antiferromagnético em baixa temperatura, dando origem ao chamado efeito magnetocalórico inverso. Ainda foi desenvolvido um modelo fenomenológico para descrever tal transição e o efeito magnetocalórico associado. Por fim é reportado o efeito magnetocalórico colossal nos compostos M n1-xCux As, devido ao qual os métodos de medida magnéticos do efeito magnetocalórico são revistos. A partir dos resultados em diferentes procedimentos de medida, é proposta uma forma de medir o efeito em materiais altamente histeréticos que não leva a resultados espúrios
Abstract: On this PhD thesis some results on the magnetic, magnetocaloric and structural properties of some series of compounds suitable for applications on magnetocaloric effect-based refrigeration are presented. The FeMnP1-xAsx series preparation methods are studied in order to optimize their magnetocaloric properties as well as to shorten its preparation time. A new series of compounds based on the previous one was studied, the MnFeGe1-xSix. These compounds present a second-order magnetic phase transition and a linear change in lattice parameters with Si content on the 0 £ x £ 0.7 range. Also associated with a second-order phase transition, the magnetocaloric effect on FeMnSn was discovered around room-temperature. A careful study of Mn2Sb-based compounds with Mn partially substituted by Cr, V, Co and Cu and Sb by Ge was performed. On these compounds an Exchange Inversion transition is induced by substitutions taking the material from the ferrimagnetic to the antiferromagnetic state with decreasing temperature, giving rise to the so-called inverse magnetocaloric effect. A phenomenological theoretical model was also developed to describe such transitions and their associated magnetocaloric effect. Finally we report on the colossal magnetocaloric effect on Cu-substituted MnAs compounds. Due to this compound¿s unusual behavior, the magnetic measurements of the magnetocaloric effect are reviewed. Based on the results of different measurement procedures a new method of measurement for highly hysteretic compounds is proposed which leads to non spurious results
Doutorado
Materiais Magneticos e Propriedades Magneticas
Doutor em Ciências
Cavaignac, André Luís de Oliveira. "Estudo comparativo dos cristais L-alanina, L-treonina e taurina com variação de temperaturas por espectroscopia Raman." Universidade Federal do Maranhão, 2015. http://tedebc.ufma.br:8080/jspui/handle/tede/1339.
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Structural, magnetic and magnetocaloric properties of the RMn2Si2 compounds (R = Tm, Dy and Tb) were studied. X ray diffraction analysis and structure Rietveld refinement shows that the samples crystallize with the desired tetragonal I4/mmm structural phase. Magnetization measurements shows second order magnetic phase transition from paramagnetic (PM) to ferromagnetic (FM) state for TmMn2Si2 compound around T = 5.2 K. On the other hand, DyMn2Si2 and TbMn2Si2 compounds present multiple phase transitions below 100 K. DyMn2Si2 present four magnetic phase transitions while TbMn2Si2 present two magnetic phase transition. Both compounds present first order FM phase transitions originated from ordering of rare earth sub-lattice. In addition, DSC measurements indicated that DyMn2Si2 and TbMn2Si2 compounds present high temperature phase transition at T~ 425 K and 444 K associated to the AFM coupling in the Mn sub-lattice. Magnetic hysteresis loop was used to characterize exchange bias effect in the DyMn2Si2 observed for magnetic fields higher than 35 kOe in which was associated to interactions between AFM and FM magnetic domain present in this compound. The largest magnetocaloric effect (MCE) was observed for TmMn2Si2 compound, when compared with other studied compound. The maximum values of entropy variation change −∆𝑆𝑀 𝑚á𝑥 and the Relative Cooling Power (RCP) found for TmMn2Si2 were, respectively, 18.5 J/kg.K and 247.5 J/kg for a magnetic field change (H) of 50 kOe. Significant values of −∆𝑆𝑀 𝑚á𝑥 (~8.2 J/kg.K and ~9.7 J/kg.K@50 kOe, respectively) and RCP (124.6 J/kg and 233 J/kg@50 kOe, respectively) as well as successive magnetic phase transitions were observed for DyMn2Si2 and TbMn2Si2 compounds. Also these two compound exhibits a table like EMC presenting a wide working window for practical applications. The results obtained for compounds motivate the preparation of a composite sample with the following concentrations 10% de TmMn2Si2, 15% de HoCoSi, 35% de DyMn2Si2 e 40% de TbMn2Si2, aiming further increase in the temperature range of maximum EMC. The maximum entropy change variation obtained for the composite sample was ~4.6 J/kg.K over a temperature range of ~80𝐾. Our results show that the compounds RMn2Si2 present important characteristics for application in magnetic refrigeration for cryogenic temperatures. Besides, it is possible to get a larger working region, when these compounds are associated forming a composite material.
Neste trabalho foi realizado um estudo das propriedades estruturais, magnéticas e magnetocalóricas dos compostos da série RMn2Si2 (R = Tm, Dy e Tb). A análise estrutural por difração de raios X e refinamento dos difratogramas pelo método de Rietveld mostraram que as amostras cristalizam na fase tetragonal grupo espacial I4/mmm. Com a medida de magnetização foi possível observar a transição de fase magnética de segunda ordem do estado paramagnético (PM) para ferromagnético (FM) para o composto TmMn2Si2 em torno de 5,2 K. Enquanto que para os compostos DyMn2Si2 e TbMn2Si2 observou-se a presença de transições múltiplas abaixo de 100 K. O DyMn2Si2 apresentou quatro transições de fase magnética enquanto que TbMn2Si2 apresentou duas. Em ambos os compostos, as transições ferromagnéticas atribuídas ao ordenamento da sub-rede da terra rara são de primeira ordem. Medidas DSC indicaram que DyMn2Si2 e TbMn2Si2 apresentam uma transição de fase em T~ 425 K e 444 K, respectivamente, ambas relacionadas ao acoplamento antiferromagnético na sub-rede do Mn. Com as medidas do loop de histerese magnética foi possível caracterizar o efeito de Exchange Bias (EB) para o DyMn2Si2, em campos magnéticos superiores a 35 kOe, o qual foi atribuído a interações entre os domínios AFM e FM presentes no material. A caracterização das propriedades magnetocalóricas do composto TmMn2Si2 mostrou uma variação de entropia magnética (-∆SM) mais intensa quando comparada aos outros compostos deste estudo. Os valores máximos obtidos para a variação isotérmica da entropia (−∆𝑆𝑀 𝑚á𝑥 ) e para o poder de resfriamento relativo (RCP) foram, respectivamente 18,5 J/kg.K e 247,5 J/kg, para ∆𝐻 = 50 kOe. Já os compostos DyMn2Si2 e TbMn2Si2 mostraram valores significativos de −∆𝑆𝑀 𝑚á𝑥 (~8,2 J/kg.K e ~9,7 J/kg.K@50 kOe, respectivamente) e RCP (124,6 J/kg e 233,6 J/kg@50 kOe, respectivamente) além de duas transições de fase magnética sucessivas, o que resultou em um EMC com comportamento do tipo table-like, caracterizado por uma ampla janela de trabalho com máximo EMC. Estes resultados motivaram a preparação de um compósito com as seguintes concentrações 10% de TmMn2Si2, 15% de HoCoSi, 35% de DyMn2Si2 e 40% de TbMn2Si2, visando ampliar ainda mais o intervalo de máximo EMC. A variação máxima de entropia obtida para o compósito foi da ordem de 4,6 J/kg.K num intervalo de temperatura de ~80𝐾. Os resultados obtidos sugerem que os compostos desta série apresentam características importantes para aplicação na refrigeração magnética em temperaturas criogênicas. Além disso, quando estes estão associados na forma de um compósito é possível obter uma grande ampliação na região de trabalho.
Частини книг з теми "Magnetocaloric effect, phase transition, magnetic refrigeration"
Hsini, Mohamed, and Souhir Bouzidi. "Magnetocaloric Properties in Gd3Ni2 and Gd3CoNi Systems." In Latest Research on Energy Recovery. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.102065.
Повний текст джерелаJemmali, Mosbah, and Lotfi Bessais. "Effect of M Substitution on Structural, Magnetic and Magnetocaloric Properties of R2Fe17-x Mx (R = Gd, Nd; M = Co, Cu) Solid Solutions." In Magnetic Skyrmions. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96299.
Повний текст джерелаHsini, Mohamed, and Sadok Zemni. "Modeling the Magnetocaloric Effect of Nd0.67Ba0.33Mn0.98 Fe0.02O3 by the Mean Field Theory." In Magnetometers - Fundamentals and Applications of Magnetism. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.82559.
Повний текст джерелаЗвіти організацій з теми "Magnetocaloric effect, phase transition, magnetic refrigeration"
Johra, Hicham. Performance overview of caloric heat pumps: magnetocaloric, elastocaloric, electrocaloric and barocaloric systems. Department of the Built Environment, Aalborg University, January 2022. http://dx.doi.org/10.54337/aau467469997.
Повний текст джерела