Structural and Magnetic Characterization of Co50Mn30InxSn(20-x) (x= 0, 5, 10, 15, and 20) Samples for Magnetocaloric Effect

Nonfiction, Science & Nature, Technology, Material Science
Cover of the book Structural and Magnetic Characterization of Co50Mn30InxSn(20-x) (x= 0, 5, 10, 15, and 20) Samples for Magnetocaloric Effect by Mst. Nazmunnahar, GRIN Verlag
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: Mst. Nazmunnahar ISBN: 9783656050834
Publisher: GRIN Verlag Publication: November 9, 2011
Imprint: GRIN Verlag Language: English
Author: Mst. Nazmunnahar
ISBN: 9783656050834
Publisher: GRIN Verlag
Publication: November 9, 2011
Imprint: GRIN Verlag
Language: English

Master's Thesis from the year 2010 in the subject Chemistry - Materials Chemistry, grade: A, University of the Basque Country (University of Basque country(UPV/EHU)), course: Material science - Masters in Nanoscience, language: English, abstract: Nowadays magnetic refrigeration which is based on the Magnetocaloric Effect (MCE) is one of the more relevant topics in the scientific research owing to its very important technological applications, which derive from the attempts made to replace the gas refrigerating technology involving, among other transcendental aspects, a low impact in the environment and an expected higher energetic efficiency. Furthermore, new and improved magnetocaloric materials are one of the cornerstones in the development of room temperature magnetic refrigeration. This master's work has mainly been concerned in a development of a deep and systematic study of magnetic and magnetocaloric properties of ribbon samples of Heusler alloy family of materials with compositions susceptible of exhibiting MCE, For this purpose, we have focused on ribbons of chemical composition Co50Mn30InxSn (20-x) (x= 0, 5, 10, 15, and 20). Co50Mn30InxSn (20-x) Heusler alloys were prepared by arc melting admixtures of the pure elements in the desired quantities under argon atmosphere. The ribbons have been prepared by melt spinning technique. X-ray characterization proved the face centered cubic austenite Heusler alloy phase (211) crystal structural with lattice constant a = 0.5947 nm of as cast and annealed ribbons. Differential Scanning Calorimetry was used to find the temperatures of the recrystallization phase transitions. Magnetization was measured for as-cast and annealed samples. Both Curie temperatures and coercivity were found to be lower in the as-cast samples than in the glass tube annealed ones. Monotonic decreasing of the Curie temperature was observed in the series with the growth of the content. MCE has been evaluated for one of the samples (x = 15) and a maximum value of entropy change is 2.37 JKg-1K-1 have been found, which is the same order of magnitude that reported of Gd alloys.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

Master's Thesis from the year 2010 in the subject Chemistry - Materials Chemistry, grade: A, University of the Basque Country (University of Basque country(UPV/EHU)), course: Material science - Masters in Nanoscience, language: English, abstract: Nowadays magnetic refrigeration which is based on the Magnetocaloric Effect (MCE) is one of the more relevant topics in the scientific research owing to its very important technological applications, which derive from the attempts made to replace the gas refrigerating technology involving, among other transcendental aspects, a low impact in the environment and an expected higher energetic efficiency. Furthermore, new and improved magnetocaloric materials are one of the cornerstones in the development of room temperature magnetic refrigeration. This master's work has mainly been concerned in a development of a deep and systematic study of magnetic and magnetocaloric properties of ribbon samples of Heusler alloy family of materials with compositions susceptible of exhibiting MCE, For this purpose, we have focused on ribbons of chemical composition Co50Mn30InxSn (20-x) (x= 0, 5, 10, 15, and 20). Co50Mn30InxSn (20-x) Heusler alloys were prepared by arc melting admixtures of the pure elements in the desired quantities under argon atmosphere. The ribbons have been prepared by melt spinning technique. X-ray characterization proved the face centered cubic austenite Heusler alloy phase (211) crystal structural with lattice constant a = 0.5947 nm of as cast and annealed ribbons. Differential Scanning Calorimetry was used to find the temperatures of the recrystallization phase transitions. Magnetization was measured for as-cast and annealed samples. Both Curie temperatures and coercivity were found to be lower in the as-cast samples than in the glass tube annealed ones. Monotonic decreasing of the Curie temperature was observed in the series with the growth of the content. MCE has been evaluated for one of the samples (x = 15) and a maximum value of entropy change is 2.37 JKg-1K-1 have been found, which is the same order of magnitude that reported of Gd alloys.

More books from GRIN Verlag

Cover of the book Todesvorstellungen von Kindern - Darstellung und theologische Diskussion by Mst. Nazmunnahar
Cover of the book Strategien der Musikindustrie im Kampf gegen peer-to-peer-Tauschbörsen: Strafverfahren oder Alternativangebote by Mst. Nazmunnahar
Cover of the book Der Übergang vom Kindergarten in die Grundschule by Mst. Nazmunnahar
Cover of the book Von einsinnigem Erkennen und einsinnigem Erzählen by Mst. Nazmunnahar
Cover of the book Grundzüge der Persönlichkeitspsychologie by Mst. Nazmunnahar
Cover of the book Das Waldensertum im Kontext der Armutsbewegung des Mittelalters by Mst. Nazmunnahar
Cover of the book The History of Multiculturalism and Immigration in the United Kingdom and Right-Wing Reactions by Mst. Nazmunnahar
Cover of the book Palladios Werk in den Bauaufnahmen Ottavio Bertotti Scamozzis (1776-1783) by Mst. Nazmunnahar
Cover of the book Aspekte der Freiwilligkeit und Wahlfreiheit nach Aristoteles by Mst. Nazmunnahar
Cover of the book Süchtiges Arbeiten. Workaholismus und Arbeitssucht im Fokus by Mst. Nazmunnahar
Cover of the book Immigration, Integration, Identifikation? by Mst. Nazmunnahar
Cover of the book Bewegungstherapie bei Atemwegserkrankungen by Mst. Nazmunnahar
Cover of the book Die Aktualität des Neuen: Eine kritische Betrachtung von Jürgen Habermas Verteidigung der Moderne by Mst. Nazmunnahar
Cover of the book Besondere Arbeitsverhältnisse by Mst. Nazmunnahar
Cover of the book Erwachsenenbildung und Radikaler Konstruktivismus - eine kritische Betrachtung der Didaktik Ernst von Glasersfelds by Mst. Nazmunnahar
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy