Simulations of refrigeration on integrated circuits using micro-channels

Pereira, A. M.; Oliveira, J. C. R. E.; Ventura, J.; Sousa, J.B.; Araújo, João P.

doi:10.1016/j.jnoncrysol.2008.06.122

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…In addition, the use of a small amount of active material has the advantage of showing a smaller relaxation time than the heat exchange process could take to reach the stationary state in the case of macro-systems. The reduction of micro-scale allows the refrigeration cycle frequency to be increased by about a factor of 10 [21].…”

Section: Methodsmentioning

confidence: 99%

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices

Zhang

Thota

Guillou

et al. 2011

J. Phys.: Condens. Matter

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Magnetic properties of a series of (La(0.7)Sr(0.3)MnO(3)/SrRuO(3)) superlattices, where the SrRuO(3) layer thickness is varying, are examined. A room-temperature magnetocaloric effect is obtained owing to the finite size effect which reduces the T(C) of La(0.7)Sr(0.3)MnO(3) layers. While the working temperature ranges are enlarged, - ΔS(M)(max) values remain similar to the values in polycrystalline La(0.7)Sr(0.3)MnO(3). Consequently, the relative cooling powers are significantly improved, the microscopic mechanism of which is related to the effect of the interfaces at La(0.7)Sr(0.3)MnO(3)/SrRuO(3) and higher nanostructural disorder. This study indicates that artificial oxide superlattices/multilayers might provide an alternative pathway in searching for efficient room-temperature magnetic refrigerator for (nano) micro-scale systems.

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Section: Methodsmentioning

confidence: 99%

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices

Zhang

Thota

Guillou

et al. 2011

J. Phys.: Condens. Matter

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“…In addition to enhanced RC values as demonstrated in this study, films have the advantage of reducing material requirements while improving the maximum refrigeration cycling frequency. 19 Recently, the coupling of the second order Curie transition in LCMO with the first order structural transition on a BTO substrate was found to produce a giant reversible magnetocaloric effect. 20 On the other hand, particle size reduction down to the nanoscale in conventional ferromagnetic materials increasingly degrades magnetocaloric performance because although the transition broadens as in the case of the films, the magnetically dead surface layer eventually accounts for a significant portion of the total sample volume.…”

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confidence: 99%

Impact of reduced dimensionality on the magnetic and magnetocaloric response of La0.7Ca0.3MnO3

Lampen¹,

Bingham²,

Phan³

et al. 2013

Applied Physics Letters

138

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Understanding the impact of reduced dimensionality on the magnetic and magnetocaloric responses of a material is vital in incorporating it as an active magnetic refrigerant in cooling devices. By contrasting the magnetic and magnetocaloric behaviors of bulk polycrystalline, sol-gel derived nanocrystalline, and pulsed laser deposited thin film forms of the La 0.7 Ca 0.3 MnO 3 system, we show that reducing the dimensionality of a ferromagnetic material tends to broaden and shift the paramagnetic to ferromagnetic transition to lower temperatures, while decreasing the saturation magnetization and the magnitude of the magnetic entropy change. Relative to its bulk counterpart, a pronounced broadening of the magnetic entropy change peak in the thin film leads to enhanced refrigerant capacity-an important figure-of-merit for active magnetic refrigeration technology. With reduced dimensionality, universal curves based on re-scaled entropy change curves tend toward collapse, indicating a weakening of the first order nature of the transition in the nanocrystalline samples and a crossover to second order in the thin film. V

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Solid state magnetic refrigerator

et al. 2012

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Simulations of refrigeration on integrated circuits using micro-channels

Cited by 7 publications

References 16 publications

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices

Impact of reduced dimensionality on the magnetic and magnetocaloric response of La0.7Ca0.3MnO3

Solid state magnetic refrigerator

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Simulations of refrigeration on integrated circuits using micro-channels

Cited by 7 publications

References 16 publications

Magnetocaloric effect and improved relative cooling power in (La0.7Sr0.3MnO3/SrRuO3) superlattices

Magnetocaloric effect and improved relative cooling power in (La0.7Sr0.3MnO3/SrRuO3) superlattices

Impact of reduced dimensionality on the magnetic and magnetocaloric response of La0.7Ca0.3MnO3

Solid state magnetic refrigerator

Contact Info

Product

Resources

About

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices

Magnetocaloric effect and improved relative cooling power in (La_0.7Sr_0.3MnO₃/SrRuO₃) superlattices