Relevant bibliographies by topics / (CH3)2NH2Co(HCOO)3

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Academic literature on the topic '(CH3)2NH2Co(HCOO)3'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "(CH3)2NH2Co(HCOO)3"

1

Yadav, Ruchika, Diptikanta Swain, H. L. Bhat, and Suja Elizabeth. "Order-disorder phase transition and multiferroic behaviour in a metal organic framework compound (CH3)2NH2Co(HCOO)3." Journal of Applied Physics 119, no. 6 (February 14, 2016): 064103. http://dx.doi.org/10.1063/1.4941544.

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2

Zhang, Zhiying, Hongliang Yu, Xin Shen, Lei Sun, Shumin Yue, and Hao Tang. "Elastic Properties and Energy Loss Related to the Disorder–Order Ferroelectric Transitions in Multiferroic Metal–Organic Frameworks [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3]." Materials 14, no. 11 (June 7, 2021): 3125. http://dx.doi.org/10.3390/ma14113125.

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Elastic properties are important mechanical properties which are dependent on the structure, and the coupling of ferroelasticity with ferroelectricity and ferromagnetism is vital for the development of multiferroic metal–organic frameworks (MOFs). The elastic properties and energy loss related to the disorder–order ferroelectric transition in [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] were investigated using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The DSC curves of [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] exhibited anomalies near 256 K and 264 K, respectively. The DMA results illustrated the minimum in the storage modulus and normalized storage modulus, and the maximum in the loss modulus, normalized loss modulus and loss factor near the ferroelectric transition temperatures of 256 K and 264 K, respectively. Much narrower peaks of loss modulus, normalized loss modulus and loss factor were observed in [(CH3)2NH2][Mg(HCOO)3] with the peak temperature independent of frequency, and the peak height was smaller at a higher frequency, indicating the features of first-order transition. Elastic anomalies and energy loss in [NH4][Mg(HCOO)3] near 256 K are due to the second-order paraelectric to ferroelectric phase transition triggered by the disorder–order transition of the ammonium cations and their displacement within the framework channels, accompanied by the structural phase transition from the non-polar hexagonal P6322 to polar hexagonal P63. Elastic anomalies and energy loss in [(CH3)2NH2][Mg(HCOO)3] near 264 K are due to the first-order paraelectric to ferroelectric phase transitions triggered by the disorder–order transitions of alkylammonium cations located in the framework cavities, accompanied by the structural phase transition from rhombohedral R3¯c to monoclinic Cc. The elastic anomalies in [NH4][Mg(HCOO)3] and [(CH3)2NH2][Mg(HCOO)3] showed strong coupling of ferroelasticity with ferroelectricity.
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3

Zhou, Haitao, Desheng Pan, Yong Li, Da Li, C. J. Choi, and Zhidong Zhang. "Magnetic transitions in metal-organic frameworks of [(CH3)2NH2]FeII(HCOO)3, [(CH3)2NH2]CoII(HCOO)3 and [(CH3)2NH2]FeIIIFeII(HCOO)6." Journal of Magnetism and Magnetic Materials 493 (January 2020): 165715. http://dx.doi.org/10.1016/j.jmmm.2019.165715.

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4

Mączka, M., T. Almeida da Silva, W. Paraguassu, and K. Pereira da Silva. "Raman scattering studies of pressure-induced phase transitions in perovskite formates [(CH3)2NH2][Mg(HCOO)3] and [(CH3)2NH2][Cd(HCOO)3]." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 156 (March 2016): 112–17. http://dx.doi.org/10.1016/j.saa.2015.11.030.

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5

Vinod, K., C. S. Deepak, Shilpam Sharma, D. Sornadurai, A. T. Satya, T. R. Ravindran, C. S. Sundar, and A. Bharathi. "Magnetic behavior of the metal organic framework [(CH3)2NH2]Co(HCOO)3." RSC Advances 5, no. 47 (2015): 37818–22. http://dx.doi.org/10.1039/c5ra01417d.

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In this study we examine the phase transitions in single crystals of [(CH3)2NH2]Co(HCOO)3, using magnetization and specific heat measurements as a function of temperature and magnetic field.
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6

Mączka, Mirosław, Anna Gągor, Bogusław Macalik, Adam Pikul, Maciej Ptak, and Jerzy Hanuza. "Order–Disorder Transition and Weak Ferromagnetism in the Perovskite Metal Formate Frameworks of [(CH3)2NH2][M(HCOO)3] and [(CH3)2ND2][M(HCOO)3] (M = Ni, Mn)." Inorganic Chemistry 53, no. 1 (December 9, 2013): 457–67. http://dx.doi.org/10.1021/ic402425n.

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7

Scatena, Rebecca, Roger D. Johnson, Pascal Manuel, and Piero Macchi. "Formate-mediated magnetic superexchange in the model hybrid perovskite [(CH3)2NH2]Cu(HCOO)3." Journal of Materials Chemistry C 8, no. 37 (2020): 12840–47. http://dx.doi.org/10.1039/d0tc03913f.

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The hybrid-perovskite [(CH3)2NH2]Cu(HCOO)3 shows antiferromagnetic and ferromagnetic interactions, as predicted by the GKA rules, proven applicable by experimental charge-density analysis.
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8

Peksa, Paulina, Justyna Trzmiel, Maciej Ptak, Aneta Ciupa-Litwa, and Adam Sieradzki. "Metal-Formate Framework Stiffening and Its Relevance to Phase Transition Mechanism." Materials 14, no. 20 (October 16, 2021): 6150. http://dx.doi.org/10.3390/ma14206150.

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In the last decade, one of the most widely examined compounds of motal-organic frameworks was undoubtedly ((CH3)2NH2)(Zn(HCOO)3), but the problem of the importance of framework dynamics in the order–disorder phase change of the mechanism has not been fully clarified. In this study, a combination of temperature-dependent dielectric, calorimetric, IR, and Raman measurements was used to study the impact of ((CH3)2NH2)(Zn(DCOO)3) formate deuteration on the phase transition mechanism in this compound. This deuteration led to the stiffening of the metal-formate framework, which in turn caused an increase in the phase transition temperature by about 5 K. Interestingly, the energetic ordering of DMA+ cations remained unchanged compared to the non-deuterated compound.
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9

Thirunavukkuarasu, Komalavalli, Rachael Richardson, Zhengguang Lu, Dmitry Smirnov, Nan Huang, Nicholas Combs, Ganesh Pokharel, and David Mandrus. "Magneto-elastic coupling in multiferroic metal-organic framework [(CH3)2NH2]Co(HCOO)3." AIP Advances 11, no. 1 (January 1, 2021): 015040. http://dx.doi.org/10.1063/9.0000147.

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10

López-Beceiro, J., C. Gracia-Fernández, S. Gómez-Barreiro, S. Castro-García, M. Sánchez-Andújar, and R. Artiaga. "Kinetic Study of the Low Temperature Transformation of Co(HCOO)3[(CH3)2NH2]." Journal of Physical Chemistry C 116, no. 1 (December 14, 2011): 1219–24. http://dx.doi.org/10.1021/jp208070d.

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Dissertations / Theses on the topic "(CH3)2NH2Co(HCOO)3"

1

Lima, Allyson Irineu Ara?jo. "Investiga??o das propriedades ?pticas e eletr?nicas do metalorg?nico [(CH3)2NH2] Zn(HCOO)3 tricl?nico." PROGRAMA DE P?S-GRADUA??O EM F?SICA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/24447.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Propriedades estruturais, eletr?nicas e ?pticas do [(CH3)2NH2] Zn(HCOO)3 Tricl?nico foram determinadas atrav?s de c?lculos de primeiros princ?pios desenvolvidos no referencial da Teoria do Funcional da Densidade (DFT) conforme codificado no Software CASTEP, utilizando-se a aproxima??o da densidade local (LDA) e aproxima??o do gradiente generalizado (GGA). Uma boa concord?ncia entre os par?metros de rede calculados e os experimentais foi obtida. Contudo, na aproxima??o GGA os resultados da otimiza??o foram mais compat?veis com os dados experimentais, apresentando na pior margem de erro +0,87% para o par?metro de rede a. Al?m disso, constatamos que esse material ? um semicondutores de gap largo, com valores de 3,67 eV (LDA) e 4,23 eV (GGA) de energia de band gap, j? nas propriedades ?pticas observamos um comportamento isotr?pico na aproxima??o GGA e um comportamento semi-isotr?pico para a aproxima??o LDA. Neste trabalho obtivemos a Otimiza??o da Estrutura Cristalina, Estrutura Eletr?nica de Bandas, Densidade de Estados, Fun??o Diel?trica e Absor??o ?ptica desses materiais para as duas aproxima??es.
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2

Yadav, Ruchika. "Growth and Studies of Phase Transitions in Multifunctional Perovskite Materials." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3680.

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Crystal growth and characterization of few multifunctional materials with perovskite (ABX3) structure are discussed in this thesis. Efforts were made to modify the magnetic and electric behaviour of these materials by selective tuning of A, B and X components. Structural, magnetic and dielectric characterization are detailed in various chapters for doped (A and B site) rare-earth manganites and organometallic compounds with different (Chloride or formate) anions. The relevant aspects of crystal structure and its relationship with ordered ground states are discussed in the introductory chapter. A detailed review of prominent theories pertaining to magnetic and ferroelectric ordering in the literature is provided. Growth of various inorganic compounds by solid-state reaction and floating zone method as well as use of solvothermal techniques for growing organometallic compounds are discussed. Material preparation, optimization of crystal growth processes and results of characterization are addressed in various chapters. The effect of Yttrium doping on structural, magnetic and dielectric properties of rare-earth manganites (RMnO3 where R = Nd, Pr) has been investigated. Neutron diffraction studies (Pr compounds) confirm A-type antiferromagnetic structure and fall in transition temperature as the Yttrium doping level increases. Diffraction experiments in conjunction with dc magnetization and ac susceptibility studies reveal magnetic frustration in excess Yttrium dopedcompounds. When mutliglass properties of 50% B-site doped Nd2NiMnO6 were investigated, evidence of re-entrant cluster glass phase was seen probably due to presence of anti-site disorder. The relaxor-like dielectric behaviour arises from crossover of relaxation time in grain and grain boundary regions. Multiferroic behaviour of the organometallic compound (C2H5NH3)2CuCl4 as well as the ferroelectric transition were investigated in detail. The role of Hydrogen bond ordering in driving structural transitions is elucidated by low temperature dielectric and Raman studies in (C2H5NH3)2CdCl4. It was found possible to tune the magnetic and ferroelectric properties in metal formate compounds (general formula AB(HCOO)3) by selectively choosing organic cations [(CH3)2NH2+; C(NH3)3+] and transition metal ion [B = Mn, Co and Cu]. The nature of magnetic ordering and transition temperature could be altered by the transition metal ion. The effect of reorientation of organic cations which leads to ferroelectric nature is discussed using dielectric and pyroelectric data. Significant results are summarized in the chapter outlining general conclusions. Future prospects of work based on these observations are also provided. The conclusions are corroborated by detailed analysis of experimental data.
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3

Yadav, Ruchika. "Growth and Studies of Phase Transitions in Multifunctional Perovskite Materials." Thesis, 2015. http://etd.iisc.ernet.in/2005/3680.

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Abstract:
Crystal growth and characterization of few multifunctional materials with perovskite (ABX3) structure are discussed in this thesis. Efforts were made to modify the magnetic and electric behaviour of these materials by selective tuning of A, B and X components. Structural, magnetic and dielectric characterization are detailed in various chapters for doped (A and B site) rare-earth manganites and organometallic compounds with different (Chloride or formate) anions. The relevant aspects of crystal structure and its relationship with ordered ground states are discussed in the introductory chapter. A detailed review of prominent theories pertaining to magnetic and ferroelectric ordering in the literature is provided. Growth of various inorganic compounds by solid-state reaction and floating zone method as well as use of solvothermal techniques for growing organometallic compounds are discussed. Material preparation, optimization of crystal growth processes and results of characterization are addressed in various chapters. The effect of Yttrium doping on structural, magnetic and dielectric properties of rare-earth manganites (RMnO3 where R = Nd, Pr) has been investigated. Neutron diffraction studies (Pr compounds) confirm A-type antiferromagnetic structure and fall in transition temperature as the Yttrium doping level increases. Diffraction experiments in conjunction with dc magnetization and ac susceptibility studies reveal magnetic frustration in excess Yttrium dopedcompounds. When mutliglass properties of 50% B-site doped Nd2NiMnO6 were investigated, evidence of re-entrant cluster glass phase was seen probably due to presence of anti-site disorder. The relaxor-like dielectric behaviour arises from crossover of relaxation time in grain and grain boundary regions. Multiferroic behaviour of the organometallic compound (C2H5NH3)2CuCl4 as well as the ferroelectric transition were investigated in detail. The role of Hydrogen bond ordering in driving structural transitions is elucidated by low temperature dielectric and Raman studies in (C2H5NH3)2CdCl4. It was found possible to tune the magnetic and ferroelectric properties in metal formate compounds (general formula AB(HCOO)3) by selectively choosing organic cations [(CH3)2NH2+; C(NH3)3+] and transition metal ion [B = Mn, Co and Cu]. The nature of magnetic ordering and transition temperature could be altered by the transition metal ion. The effect of reorientation of organic cations which leads to ferroelectric nature is discussed using dielectric and pyroelectric data. Significant results are summarized in the chapter outlining general conclusions. Future prospects of work based on these observations are also provided. The conclusions are corroborated by detailed analysis of experimental data.
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