2001
DOI: 10.1088/0022-3727/34/8/306
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Magnetic molecular clusters as promising materials for refrigeration in low-temperature regions

Abstract: A wide class of magnetic molecular materials - molecular clusters with high magnetic moment containing 3d transition metals (such as `Fe8', `Mn12ac', etc) - have been considered from the point of view of their use as refrigerants in low-temperature regions. The consideration was made in the framework of the model based on the Langevin theory of a superparamagnet. The magnetic entropy change caused by a change in an external magnetic field was calculated for various magnetic clusters. The estimations made show … Show more

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Cited by 81 publications
(46 citation statements)
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“…liquefaction of hydrogen, infrared bolometer) in the temperature range of 1 -20 K. 7 Superparamagnetic molecular magnetic clusters and gadolinium garnet (Gd 3 Ga 5 O 12 ) are considered as potential magnetic refrigerants in this temperature range. 8 In this work, we report the occurrence of a giant magnetocaloric effect at cryogenic temperatures (T < 30 K) in a novel class of magnetoelectric materials, Eu 1-x Ba x TiO 3, whose end members have distinct ferroic orders. While EuTiO 3 (x = 0) is a paraelectricantiferromagnet, BaTiO 3 (x = 1) is a ferroelectric-nonmagnet.…”
Section: Introductionmentioning
confidence: 90%
“…liquefaction of hydrogen, infrared bolometer) in the temperature range of 1 -20 K. 7 Superparamagnetic molecular magnetic clusters and gadolinium garnet (Gd 3 Ga 5 O 12 ) are considered as potential magnetic refrigerants in this temperature range. 8 In this work, we report the occurrence of a giant magnetocaloric effect at cryogenic temperatures (T < 30 K) in a novel class of magnetoelectric materials, Eu 1-x Ba x TiO 3, whose end members have distinct ferroic orders. While EuTiO 3 (x = 0) is a paraelectricantiferromagnet, BaTiO 3 (x = 1) is a ferroelectric-nonmagnet.…”
Section: Introductionmentioning
confidence: 90%
“…20 Nanoscaled magnetic materials are good candidates for magnetic refrigeration due to a presence of a large MCE in the superparamagnetic system and reduced hysteresis losses. 17,[21][22][23][24][25][26][27] Additionally, magnetocaloric nanoparticles have a broader entropy change over a wider temperature span which may results in a higher relative cooling power (RCP) that is defined as RCP = −∆S M (T , H)×δT FWHM , where ∆S M is the refrigerant's magnetic entropy change and δT FWHM is the full-width-at-halfmaximum of the peak of magnetic entropy. 28,29 RCP measures how much heat can be transferred between the cold and hot heat exchangers in an ideal refrigeration cycle.…”
Section: Introductionmentioning
confidence: 99%
“…An importance of the MCE consists in its potential usage for a magnetic refrigeration through the process of adiabatic demagnetization [1]. The magnetic materials with the large MCE are therefore of technological interest with regard to their cooling capability either at room or low temperatures [2].…”
Section: Introductionmentioning
confidence: 99%