Spontaneous generation of voltage in the magnetocaloric compound Tb5Si2.2Ge1.8 and elemental Gd

Autor:	Deborah L. Schlagel, Vitalij K. Pecharsky, Min Zou, T.A. Lograsso, Karl A. Gschneidner
Rok vydání:	2009
Předmět:	Materials science Condensed matter physics Mechanical Engineering Gadolinium Metals and Alloys Intermetallic chemistry.chemical_element Magnetic field chemistry Mechanics of Materials Phase (matter) Voltage generator Materials Chemistry Magnetic refrigeration Anisotropy Voltage
Zdroj:	Journal of Alloys and Compounds. 488:550-553
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2008.09.032
Popis:	The spontaneous generation of voltage (SGV) in single crystalline Tb 5 Si 2.2 Ge 1.8 and Gd has been studied. Temperature-induced SGVs were observed along the three principal crystallographic axes of Tb 5 Si 2.2 Ge 1.8 , but not in Gd. Field-induced SGVs were observed with magnetic fields less than 40 kOe applied along the a -axis of Tb 5 Si 2.2 Ge 1.8 , and the c -axis of Gd. The absence of the temperature-induced SGV in Gd indicates the key role first-order phase transformations play in the appearance of the effect when temperature varies. The anisotropy of the magnetic field-induced SGV in Tb 5 Si 2.2 Ge 1.8 and the existence of the field-induced SGV in Gd, highlight the importance of the magnetocaloric effect in bringing about the SGV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4327a018efaec0b35399e455081ca53 https://doi.org/10.1016/j.jallcom.2008.09.032 Zobrazit plný text záznamu Full Text from ScienceDirect