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Magnetochemistry
Special Issues
Magnetocaloric Effect in Molecular Magnets
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Magnetocaloric Effect in Molecular Magnets

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Materials".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 2773

Special Issue Editor

Dr. Piotr Konieczny

E-Mail Website
Guest Editor
Department of Molecular Magnetism, The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Kraków, Poland
Interests: magnetocaloric effect; magnetic relaxations; magnetic anisotropy; magnetism under pressure; molecular magnetism

Special Issue Information

Dear Colleagues,

In 1881 Emil Warburg discovered the magnetocaloric effect (MCE) in iron. Over the past 140 years, several outstanding achievements in this field have been obtained, including the Nobel Prize for William Giauque. Despite the passage of so many years, the MCE is still intensively studied. We are still fighting for the best performance, optimal temperature range and cost-effective solutions to push the MCE from laboratory to wide commercial application. At present, this battle is even more crucial since the warming climate is one of the most important challenges of our generation. Although most MCE research is focused on alloys, molecular magnets provide an alternative approach, and are not limited to low-temperature applications. Recent results on the barocaloric effect (which is very analogous to MCE) for spin crossover compounds reveal remarkable performance close to room temperature.

The aim of this Special Issue is to provide a comprehensive collection of articles which will describe the current status of MCE research. It will be an opportunity to present new results, summarize the research carried out so far, and introduce the MCE to newcomers. Both theoretical and experimental articles are welcome.

Dr. Piotr Konieczny
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetocaloric effect
  • rotating magnetocaloric effect
  • single molecular magnets
  • spin crossover
  • magnetic cooling
  • magnetic refrigerant
  • magnetic refrigerants
  • barocaloric effect
  • coordination polymers
  • molecular magnets

Published Papers (1 paper)

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Research

12 pages, 2720 KiB  
Article
Giant Rotational Magnetocaloric Effect in Ni(en)(H2O)4·2H2O: Experiment and Theory
by Petro Danylchenko, Róbert Tarasenko, Erik Čižmár, Vladimír Tkáč, Alexander Feher, Alžbeta Orendáčová and Martin Orendáč
Magnetochemistry 2022, 8(4), 39; https://doi.org/10.3390/magnetochemistry8040039 - 2 Apr 2022
Cited by 2 | Viewed by 2286
Abstract
An experimental study of the rotational magnetocaloric effect in Ni(en)(H2O)4SO4∙2H2O (en = ethylenediamine) single crystal is presented. The study was carried out at temperatures above 2 K and was associated with adiabatic [...] Read more.
An experimental study of the rotational magnetocaloric effect in Ni(en)(H2O)4SO4∙2H2O (en = ethylenediamine) single crystal is presented. The study was carried out at temperatures above 2 K and was associated with adiabatic crystal rotation between the easy plane and hard axis in magnetic fields up to 7 T. The magnetocaloric properties of the studied system were investigated by isothermal magnetization measurement. The experimental observations were completed with ab initio calculations of the anisotropy parameters. A large rotational magnetic entropy change ≈12 Jkg−1K−1 and ≈16.9 Jkg−1K−1 was achieved in 5 T and 7 T, respectively. The present study suggests a possible application of this material in low-temperature refrigeration since the adiabatic rotation of the single crystal in 7 T led to a cooldown of the sample from the initial temperature of 4.2 K down to 0.34 K. Finally, theoretical calculations show that S = 1 Ni(II)-based systems with easy-plane anisotropy can have better rotational magnetocaloric properties than costly materials containing rare-earth elements in their chemical structures. Full article
(This article belongs to the Special Issue Magnetocaloric Effect in Molecular Magnets)
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