A review and new perspectives for the magnetocaloric effect: New materials and local heating and cooling inside the human body

Tishin, A.M.; Spichkin, Y I; Zverev, V. I.; Egolf, Peter W.

doi:10.1016/j.ijrefrig.2016.04.020

Cited by 137 publications

(71 citation statements)

References 51 publications

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“…A rapid growth in the field of finding an environmentally friendly alternative refrigerant for the conventional vapor‐compression cooling system is increased in the last two decades . The magnetic materials undergo the isothermal change of entropy or the adiabatic change of temperature upon the application of external magnetic field and it is said to be the magnetocaloric effect (MCE) . In the year 1881 Warburg observed the evolution of heat from the iron material under the application of magnetic field .…”

Section: Introductionmentioning

confidence: 99%

“…In the year 1881 Warburg observed the evolution of heat from the iron material under the application of magnetic field . Later, Weiss and Piccard had made the basic discovery of magnetocaloric effect in the year 1917 . Thereafter various first order and second order phase transition materials have been explored as refrigerants where FeRh alloys showed the largest MCE .…”

Section: Introductionmentioning

confidence: 99%

“…Later, Weiss and Piccard had made the basic discovery of magnetocaloric effect in the year 1917 . Thereafter various first order and second order phase transition materials have been explored as refrigerants where FeRh alloys showed the largest MCE . Presently, the second order phase transition magnetic materials that show appreciable magnetocaloric effect near room temperature and large relative cooling power (RCP) are of special interest due to their non‐toxicity, economical compared to rare earth elements, and facile processing methods .…”

Section: Introductionmentioning

confidence: 99%

“…Thereafter various first order and second order phase transition materials have been explored as refrigerants where FeRh alloys showed the largest MCE . Presently, the second order phase transition magnetic materials that show appreciable magnetocaloric effect near room temperature and large relative cooling power (RCP) are of special interest due to their non‐toxicity, economical compared to rare earth elements, and facile processing methods . In which, spinel ferrites are attracted the researchers as their magnetic properties such as single domain superparamagnetism, magnetic transition temperature, and/or the blocking temperature ( T B ) are tunable by the particle size and its distribution, morphology, and the stoichiometry .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetocaloric Effect and Universal Curve Behavior in Superparamagnetic Zinc Ferrite Nanoparticles Synthesized via Microwave Assisted Co‐Precipitation Method

Prabhakaran

Viswanathan

Denardin³

2018

Physica Status Solidi (a)

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Single domain superparamagnetic zinc ferrite nanoparticles are synthesized through microwave assisted co‐precipitation method. Single phase and cubic spinel zinc ferrite nanoparticles shows the narrow particle size distribution with an average particle size of 5.07 nm. They exhibits superparamagnetic nature at 290 K and ferromagnetism at 5 K with a blocking temperature of around 25 K. The magnetic entropy change calculated from the set of isothermal magnetization curves shows the maximum entropy change of −0.652 J kg−1 K−1 at 135 K and large relative cooling power (RCP) of 187 J kg−1 for the field of 40 kOe. The synthesized zinc ferrite nanoparticles exhibits large magnetic anisotropy constant of 12.625 × 106 erg cm−3 with an appreciable magnetic entropy change. The field dependence of maximum magnetic entropy change and RCP values is discussed by using power law equations. Furthermore, an attempt is made to study the phenomenological curve behavior of magnetic entropy change for the zinc ferrite nanoparticles. Interestingly, the magnetic entropy change at the range of magnetic fields collapses into a single universal phenomenological curve when rescaling the temperature axis with two reference temperatures. The obtained results conveys that the zinc ferrite nanoparticles is prospective magnetic refrigerant for miniaturized devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetocaloric Effect and Universal Curve Behavior in Superparamagnetic Zinc Ferrite Nanoparticles Synthesized via Microwave Assisted Co‐Precipitation Method

Prabhakaran

Viswanathan

Denardin³

2018

Physica Status Solidi (a)

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“…Combining these materials with thermally sensitive drug-loaded polymers, drug delivery platforms with magnetic-field tunable drug release profiles can be developed. 176,178 Another therapeutic capsule for obesity and weight loss management was reported in Ref. 179.…”

Section: B7 Therapeuticsmentioning

confidence: 99%

Magnetically guided capsule endoscopy

et al. 2017

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Wireless capsule endoscopy (WCE) is a powerful tool for medical screening and diagnosis, where a small capsule is swallowed and moved by means of natural peristalsis and gravity through the human gastrointestinal (GI) tract. The camera-integrated capsule allows for visualization of the small intestine, a region which was previously inaccessible to classical flexible endoscopy. As a diagnostic tool, it allows to localize the sources of bleedings in the middle part of the gastrointestinal tract and to identify diseases, such as inflammatory bowel disease (Crohn's disease), polyposis syndrome, and tumors. The screening and diagnostic efficacy of the WCE, especially in the stomach region, is hampered by a variety of technical challenges like the lack of active capsular position and orientation control. Therapeutic functionality is absent in most commercial capsules, due to constraints in capsular volume and energy storage. The possibility of using body-exogenous magnetic fields to guide, orient, power, and operate the capsule and its mechanisms has led to increasing research in Magnetically Guided Capsule Endoscopy (MGCE). This work shortly reviews the history and state-of-art in WCE technology. It highlights the magnetic technologies for advancing diagnostic and therapeutic functionalities of WCE. Not restricting itself to the GI tract, the review further investigates the technological developments in magnetically guided microrobots that can navigate through the various air-and fluid-filled lumina and cavities in the body for minimally invasive medicine.

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Magnetic Field‐Assisted Water Splitting: Mechanism, Optimization Strategies, and Future Perspectives

Ma,

Fu,

Han

et al. 2024

Adv Funct Materials

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Rationally designing of highly efficient electrocatalysts is critical to improving hydrogen production by water electrolysis. However, bottlenecks still require consideration when optimizing the intrinsic performance of electrocatalysts. Applying appropriate external fields to catalytic systems may effectively overcome such bottlenecks and enhance the performance of catalysts. Among various external fields, the magnetic field has received extensive attention owing to its multifunctionality, non‐contact nature, and non‐invasiveness, thereby requiring more research and development. In this review, recent advances in magnetic field‐assisted water electrolysis are systematically outlined. Firstly, the diverse methods used for pre‐regulating catalysts under magnetic fields, including optimized nucleation, induction heating, and directed growth, are discussed. It then explores the effects of magnetic fields on electrochemical processes, including magnetothermal, magnetohydrodynamic, and induced electric impact. Then, the influences of magnetic fields on the intrinsic properties of catalysts, such as spin polarization and spin reconstruction effects, are addressed. Finally, a discussion of the potential perspectives of magnetic field‐enhanced water splitting, including catalyst design, experimental precision, and in situ characterization, are then provided to guide further research.

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A review and new perspectives for the magnetocaloric effect: New materials and local heating and cooling inside the human body

Cited by 137 publications

References 51 publications

Magnetocaloric Effect and Universal Curve Behavior in Superparamagnetic Zinc Ferrite Nanoparticles Synthesized via Microwave Assisted Co‐Precipitation Method

Magnetocaloric Effect and Universal Curve Behavior in Superparamagnetic Zinc Ferrite Nanoparticles Synthesized via Microwave Assisted Co‐Precipitation Method

Magnetically guided capsule endoscopy

Magnetic Field‐Assisted Water Splitting: Mechanism, Optimization Strategies, and Future Perspectives

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