Search Results - "Carvalho, A. Magnus G."

1

Academic Journal

Theoretical investigation on the magnetic and electric properties in TbSb compound through an anisotropic microscopic model.

Authors: von Ranke, P. J., Ribeiro, P. O., Carvalho, A. Magnus G., Alho, B. P., Alvarenga, T. S. T., Nobrega, E. P., Caldas, A., de Sousa, V. S. R., Lopes, P. H. O., de Oliveira, N. A.

Source: Journal of Applied Physics; 5/14/2016, Vol. 119 Issue 18, p183903-1-183903-5, 5p, 5 Graphs

Subject Terms: MAGNETIC anisotropy, MAGNETORESISTANCE, MAGNETIC entropy, ANTIFERROMAGNETISM, MATHEMATICAL models, ANISOTROPY

2

i-Caloric Effects: a proposal for normalization

Authors: Imamura, William, Paix��o, Lucas S., Usuda, ��rik O., Bom, Nicolau M., Gama, Sergio, Lopes, ��der S. N., Carvalho, Alexandre Magnus G.

Subject Terms: Condensed Matter - Materials Science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences

Access URL: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e79b5509b07cad27a46e2a6064c52305
http://arxiv.org/abs/1806.07959

3

Academic Journal

Effects of Ga substitution on the structural and magnetic properties of half metallic Fe2MnSi Heusler compound.

Authors: Pedro, S. S., Caraballo Vivas, R. J., Andrade, V. M., Cruz, C., Paixão, L. S., Contreras, C., Costa-Soares, T., Caldeira, L., Coelho, A. A., Carvalho, A. Magnus G., Rocco, D. L., Reis, M. S.

Source: Journal of Applied Physics; 1/7/2015, Vol. 117 Issue 1, p013902-1-013902-5, 5p, 6 Graphs

Subject Terms: MAGNETIC properties, MAGNETIC moments, CONDUCTION electrons, TRANSITION temperature, MAGNETISM, SPIN polarization

4

Academic Journal

Theoretical investigation on the existence of inverse and direct magnetocaloric effect in perovskite EuZrO3.

Authors: Alho, B. P., Nóbrega, E. P., de Sousa, V. S. R., Carvalho, A. Magnus G., de Oliveira, N. A., von Ranke, P. J.

Source: Journal of Applied Physics; Apr2011, Vol. 109 Issue 8, p083942, 6p

Subject Terms: PEROVSKITE, OXIDE minerals, FIELD theory (Physics), MONTE Carlo method, MAGNETIC susceptibility

5

Academic Journal

Magnetocaloric effect in GdGeSi compounds measured by the acoustic detection technique: Influence of composition and sample treatment.

Authors: Guimarães, A. O., Soffner, M. E., Mansanares, A. M., Coelho, A. A., Carvalho, A. Magnus G., Pires, M. J. M., Gama, S., da Silva, E. C.

Source: Journal of Applied Physics; Apr2010, Vol. 107 Issue 7, p073524-073530, 6p, 8 Graphs

Subject Terms: PHYSICS research, PELLETIZING, METALLIC composites, MAGNETISM, MAGNETIC fields, MAGNETOSTRICTION, CRYSTALLOGRAPHY

6

Academic Journal

Theoretical investigation on the magnetocaloric effect in garnets R3Fe5O12 where (R=Y and Dy).

Authors: von Ranke, P. J., Alho, B. P., Plaza, E. J. R., Carvalho, A. Magnus G., de Sousa, V. S. R., de Oliveira, N. A.

Source: Journal of Applied Physics; Sep2009, Vol. 106 Issue 5, p053914-053920, 6p, 6 Graphs

Subject Terms: ADIABATIC demagnetization, GARNET, MATHEMATICAL models, RARE earth metals, CRYSTALLINE electric field, NEUTRON diffraction

7

Academic Journal

The giant anisotropic magnetocaloric effect in DyAl2.

Authors: von Ranke, P. J., de Oliveira, N. A., Plaza, E. J. R., de Sousa, V. S. R., Alho, B. P., Carvalho, A. Magnus G., Gama, S., Reis, M. S.

Source: Journal of Applied Physics; Nov2008, Vol. 104 Issue 9, p093906, 4p, 1 Diagram, 3 Graphs

Subject Terms: ANISOTROPY, DYSPROSIUM, HAMILTONIAN systems, CRYSTALLINE electric field, MAGNETIC fields

8

Academic Journal

Isothermal variation of the entropy (ΔST) for the compound Gd5Ge4 under hydrostatic pressure.

Authors: Carvalho, A. Magnus G., Coelho, A. A., Gama, S., von Ranke, P. J., Alves, C. S.

Source: Journal of Applied Physics; Sep2008, Vol. 104 Issue 6, p063915, 5p, 7 Graphs

Subject Terms: ENTROPY, HYDROSTATIC pressure, GADOLINIUM, GERMANIUM, LOW temperatures, IRREVERSIBLE processes (Thermodynamics), MAGNETISM

9

Academic Journal

Experimental and theoretical analyses of PrAl2 and NdAl2 composite for use as an active magnetic regenerator.

Authors: Carvalho, A. Magnus G., Campoy, J. C. P., Coelho, A. A., Plaza, E. J. R., Gama, S., von Ranke, P. J.

Source: Journal of Applied Physics; 4/15/2005, Vol. 97 Issue 8, p083905, 5p, 8 Graphs

Subject Terms: MAGNETIC structure, CRYSTALLOGRAPHY, MAGNETICS, ELECTRICAL engineering, MAGNETISM, ELECTRIC fields, FIELD theory (Physics), ELECTROMAGNETIC fields

10

Academic Journal

Large magnetocaloric effect and refrigerant capacity near room temperature in as-cast Gd5Ge2Si2-xSnx compounds.

Authors: Carvalho, A. Magnus G., Tedesco, J. C. G., Pires, M. J. M., Soffner, M. E., Guimarães, A. O., Mansanares, A. M., Coelho, A. A.

Source: Applied Physics Letters; 5/13/2013, Vol. 102 Issue 19, p192410, 4p, 2 Charts, 4 Graphs

Subject Terms: MAGNETOCALORIC effects, MAGNETIC fields, MAGNETIC field measurements, ELECTROMAGNETISM, THERMAL properties

11

Academic Journal

A General Approach to First Order Phase Transitions and the Anomalous Behavior of Coexisting Phases in the Magnetic Case.

Authors: Gama, Sergio, de Campos, Ariana, Coelho, Adelino A., Alves, Cleber S., Ren, Yang, Garcia, Flávio, Brown, Dennis E., da Silva, Luzeli M., Carvalho, A. Magnus G., Gandra, Flávio C. G., dos Santos, Adenilson O., Cardoso, Lisandro P., von Ranke, Pedro J.

Source: Advanced Functional Materials; Mar2009, Vol. 19 Issue 6, p942-949, 8p

12

Academic Journal

Investigation of the first-order metamagnetic transitions and the colossal magnetocaloric effect using a Landau expansion applied to MnAs compound.

Authors: Carvalho, A. Magnus G., Coelho, A. A., Gama, S., Gandra, F. C. G., Von Ranke, P. J., de Oliveira, N. A.

Source: European Physical Journal B: Condensed Matter; Mar2009, Vol. 68 Issue 1, p67-72, 6p, 1 Chart, 7 Graphs

Subject Terms: FERROMAGNETISM, MAGNETIZATION, ATMOSPHERIC temperature, HYSTERESIS, MAGNETICS, ENTROPY

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13

Academic Journal

Spin reorientation and the magnetocaloric effect in HoyEr(1-y)N.

Authors: von Ranke, P. J., Alvarenga, T. S. T., Alho, B. P., Nóbrega, E. P., Ribeiro, P. O., Carvalho, A. Magnus G., de Sousa, V. S. R., Caldas, A., de Oliveira, N. A.

Source: Journal of Applied Physics; Jun2012, Vol. 111 Issue 11, p113916-113916-7, 1p, 8 Graphs

Subject Terms: MAGNETIC devices, HAMILTONIAN systems, DIFFERENTIABLE dynamical systems, HAMILTON-Jacobi equations, ENTROPY

14

Academic Journal

Ambient pressure colossal magnetocaloric effect in Mn1-xCuxAs compounds.

Authors: Rocco, Daniel L., de Campos, Ariana, Carvalho, Alexandre Magnus G., Caron, Luana, Coelho, A. A., Gama, S., Gandra, Flávio C. G., dos Santos, Adenilson O., Cardoso, Lisandro P., von Ranke, Pedro J., de Oliveira, Nilson A.

Source: Applied Physics Letters; 6/11/2007, Vol. 90 Issue 24, p242507, 3p, 4 Graphs

Subject Terms: HIGH pressure (Technology), INDUSTRIAL chemistry, IRON, METALS, PHYSICS

15

Academic Journal

Ambient pressure colossal magnetocaloric effect tuned by composition in Mn1−xFexAs.

Authors: de Campos, Ariana, Rocco, Daniel L., Carvalho, Alexandre Magnus G., Caron, Luana, Coelho, Adelino A., Gama, Sergio, da Silva, Luzeli M., Gandra, Flávio C. G., dos Santos, Adenilson O., Cardoso, Lisandro P., von Ranke, Pedro J., de Oliveira, Nilson A.

Source: Nature Materials; Oct2006, Vol. 5 Issue 10, p802-804, 3p, 4 Graphs

Subject Terms: MAGNETISM, MAGNETOCHEMISTRY, ELECTROCHEMISTRY, MAGNETOTHERAPY, ADIABATIC demagnetization, ELECTROMAGNETISM

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16

Academic Journal

Photoacoustic based technique for measuring the magnetocaloric effect.

Authors: Guimarães, A. O., Mansanares, A. M., Carvalho, A. Magnus G., Coelho, A. A., Gama, S., Pires, M. J. M., Silva, E. C. da

Source: Journal of Physics: Conference Series; 2010, Vol. 214 Issue 1, p1-1, 1p

17

Academic Journal

The influence of the magnetoelastic interaction on the magnetocaloric effect in ferrimagnetic systems: a theoretical investigation.

Authors: Alho BP; Instituto de Física Armando Dias Tavares, Universidade do Estado do Rio de Janeiro-UERJ, Rio de Janeiro, RJ, Brazil. brunoalho@gmail.com, de Oliveira NA, de Sousa VS, Plaza EJ, Carvalho AM, von Ranke PJ

Source: Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2010 Dec 08; Vol. 22 (48), pp. 486008. Date of Electronic Publication: 2010 Nov 18.

Publication Type: Journal Article

Journal Info: Publisher: IOP Pub Country of Publication: England NLM ID: 101165248 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1361-648X (Electronic) Linking ISSN: 09538984 NLM ISO Abbreviation: J Phys Condens Matter Subsets: PubMed not MEDLINE

18

Academic Journal

Pressure-induced colossal magnetocaloric effect in MnAs.

Authors: Gama S; Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas-UNICAMP, Caixa Postal 6165, 13083-970 Campinas, São Paulo, Brazil., Coelho AA, de Campos A, Carvalho AM, Gandra FC, von Ranke PJ, de Oliveira NA

Source: Physical review letters [Phys Rev Lett] 2004 Dec 03; Vol. 93 (23), pp. 237202. Date of Electronic Publication: 2004 Nov 30.

Publication Type: Journal Article

Journal Info: Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0031-9007 (Print) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: PubMed not MEDLINE