Advanced materials for magnetic cooling: Fundamentals and practical aspects.
Авторы: Balli M., Jandl S., Fournier P.
APPLIED PHYSICS REVIEWS
Over the last two decades, the research activities on magnetocalorics have been exponentially
increased, leading to the discovery of a wide category of materials including intermetallics and
oxides. Even though the reported materials were found to show excellent magnetocaloric properties
on a laboratory scale, only a restricted family among them could be upscaled toward industrial levels
and implemented as refrigerants in magnetic cooling devices. On the other hand, in the most of the
reported reviews, the magnetocaloric materials are usually discussed in terms of their adiabatic
temperature and entropy changes (DTad and DS), which is not enough to get more insight about their
large scale applicability. In this review, not only the fundamental properties of the recently reported
magnetocaloric materials but also their thermodynamic performance in functional devices are
discussed. The reviewed families particularly include Gd1-xRx alloys, LaFe13-xSix, MnFeP1-xAsx, and
R1-xAxMnO3 (R¼ lanthanide and A ¼ divalent alkaline earth)–based compounds. Other relevant
practical aspects such as mechanical stability, synthesis, and corrosion issues are discussed. In
addition, the intrinsic and extrinsic parameters that play a crucial role in the control of magnetic and
magnetocaloric properties are regarded. In order to reproduce the needed magnetocaloric parameters,
some practical models are proposed. Finally, the concepts of the rotating magnetocaloric effect and
multilayered magnetocalorics are introduced.