Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Milan Bratko"'
Autor:
M. Katter, Vittorio Basso, Milan Bratko, Alexander Barcza, A. David Caplin, Lesley F. Cohen, Edmund Lovell
Publikováno v:
Physical Review B. 95
Definitive determination of first order character of the magnetocaloric magnetic transition remains elusive. Here we use a microcalorimetry technique in two modes of operation to determine the contributions to entropy change from latent heat and heat
Autor:
Alexander Barcza, Lesley F. Cohen, Edmund Lovell, J.A. Turcaud, Luis Ghivelder, A Nicotina, M. Katter, Milan Bratko, Basso, A.D. Caplin
Publikováno v:
Physical Review B. 94
It is now well established that the paramagnetic-to-ferromagnetic transition in the magnetocaloric $\mathrm{La}{(\mathrm{FeSi})}_{13}$ is a cooperative effect involving spin, charge, and lattice degrees of freedom. However, the influence of this corr
Autor:
Milan Bratko, A. David Caplin, M. Katter, Luis Ghivelder, Edmund Lovell, Alexander Barcza, Lesley F. Cohen
Publikováno v:
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences. 374(2074)
Here, we study the temporal evolution of the magnetic field-driven paramagnetic to ferromagnetic transition in the La(Fe,Mn,Si) 13 material family. Three compositions are chosen that show varying strengths of the first-order character of the transiti
Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)(13)-H compounds
Autor:
Vittorio Basso, Cecilia Bennati, Milan Bratko, Michaela Küpferling, M. Katter, Carmen Curcio, Alexander Barzca, Lesley F. Cohen, J.A. Turcaud, Edmund Lovell
In this paper, we present the results of an experimental investigation on the magnetocaloric properties of hydrogenated La(Fe-Mn-Si)13-H with Mn substituting Fe to finely tune the transition temperature. We measured the specific heat under magnetic f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::505323eef250d60d5b3f872b5c6953c4
http://hdl.handle.net/10044/1/28650
http://hdl.handle.net/10044/1/28650
Publikováno v:
Journal of Physics D: Applied Physics. 50:424004
Refrigeration cycle rates of the order of 15 Hz are desirable for efficient solid state based magnetocaloric cooling, placing an upper bound on the combined magnetic transition and the heat transfer times of the order of tens of msecs. We use microca
Autor:
Lesley F. Cohen, Karl G. Sandeman, Ariana de Campos, Milan Bratko, Kelly Morrison, Sergio Gama
Publikováno v:
Applied Physics Letters. 100:252409
We use a calorimetric technique operating in sweeping magnetic field to study the thermomagnetic history- dependence of the magnetocaloric effect (MCE) in Mn0.985Fe0.015As. We study the magnetization history for which a "colossal" MCE has been report
Publikováno v:
Review of Scientific Instruments
Microcalorimetry has proven to be a versatile tool to investigate first order magnetic phase transitions as it can be used in different experimental modes to separate the latent heat from heat capacity. However, the methodology fails if the latent he