Journal ArticleDOI
Giant magnetocaloric effect in itinerant-electron metamagnets
H. Yamada,T. Goto +1 more
TLDR
In this article, an isothermal magnetic entropy change for 3D transition metal compounds is discussed based on the theory of the itinerant-electron metamagnetism, which depends not only on the magnetization jump at the Curie temperature, but also on the temperature dependence of the critical field of the metamagnetic transition.Abstract:
Based on the theory of the itinerant-electron metamagnetism, an isothermal magnetic entropy change is discussed for 3d transition metal compounds. The magnetic entropy change depends not only on the magnetization jump at the Curie temperature, but also on the temperature dependence of the critical field of the metamagnetic transition. The isothermal magnetic entropy changes for Co(S,Se) 2 , Lu(Co,Al) 2 and Lu(Co,Ga) 2 are estimated and compared with those observed for MnFe(P,As) and La(Fe,Si) 13 .read more
Citations
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Journal ArticleDOI
Recent developments in magnetocaloric materials
TL;DR: The recent literature concerning the magnetocaloric effect (MCE) has been reviewed and correlations have been made comparing the behaviours of the different families of magnetic materials which exhibit large or unusual MCE values.
Journal ArticleDOI
Theoretical aspects of the magnetocaloric effect
N.A. de Oliveira,P.J. von Ranke +1 more
TL;DR: In this paper, the theoretical aspects of the magnetocaloric effect in rare earth metals and their alloys as well as in transition metal based compounds are discussed by using model Hamiltonians of interacting localized magnetic moments.
Journal ArticleDOI
Viable Materials with a Giant Magnetocaloric Effect
TL;DR: A review of the current state of magnetocalorics is focused on materials exhibiting a giant magnetocaloric response near room temperature as discussed by the authors, which is the state of the art.
Journal ArticleDOI
Field-tuned magnetocaloric effect in metamagnetic manganite system
TL;DR: In this paper, the authors investigated the origin of the huge magnetocaloric effect in a manganite system with ferro-antiferromagnetic phase mixture at low temperatures and carried out magnetic measurements in fields up to 100 kOe in order to show that both a high hysteretic behavior and a metamagnetic transition in the antiferrome state are responsible for the large magnetic entropy change.
Book ChapterDOI
Chapter Four Magnetocaloric Refrigeration at Ambient Temperature
TL;DR: In this paper, a review of magnetic refrigerant-materials for room-temperature applications is presented, focusing on transition metal containing compounds, as we expect that the limited availability of rare-earth elements will hamper the industrial applicability.
References
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Journal ArticleDOI
Transition-metal-based magnetic refrigerants for room-temperature applications
TL;DR: The discovery of a large magnetic entropy change is reported in MnFeP0.45As0.55, a material that has a Curie temperature of about 300 K and which allows magnetic refrigeration at room temperature, attributed to a field-induced first-order phase transition enhancing the effect of the applied magnetic field.
Journal ArticleDOI
Magnetocaloric effect and magnetic refrigeration
TL;DR: In this article, the magnetocaloric effect along with recent progress and future needs in both the characterization and exploration of new magnetic refrigerant materials with respect to their magnetoric properties are discussed.
Book
Spin Fluctuations in Itinerant Electron Magnetism
Tôru Moriya,Yoshinori Takahashi +1 more
TL;DR: In this paper, a general theory of spin fluctuations and thermodynamical properties of itinerant electron magnets is developed, interpolating between the weakly and strongly ferromagnetic limits, and a unified expression is given for the Curie temperature and the physical meaning of the curie-Weiss magnetic susceptibility is discussed.
Journal ArticleDOI
Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6
TL;DR: The magnetic phase transition at the Curie temperature of LaFe11.4Si1.6 with cubic NaZn13-type structure was measured as a function of temperature and magnetic field as mentioned in this paper.