Chemical potential induced phase transitions

Autor:	Mariusz Pietruszka, A. Molak, M. Matlak
Rok vydání:	2004
Předmět:	Phase transition Condensed matter physics Contact resistance chemistry.chemical_element Condensed Matter Physics Thermostat Electronic Optical and Magnetic Materials law.invention Chromium chemistry Electrical resistivity and conductivity law Fermi gas Contact electrode
Zdroj:	physica status solidi (b). 241:R23-R26
ISSN:	1521-3951 0370-1972
Popis:	A simple electrical set-up to detect phase transitions is proposed and applied to a series of investigated samples: Gd, Cr, TiNi and CuZnSn, all exhibiting different types of phase transitions. The sample is glued to a contact electrode (here Ag) and immersed into a thermostat. We measure the electrical resistivity of the contact electrode as function of temperature. Due to the fact that the chemical potentials of the sample and the contact electrode should be equal (μs = μe) the electron gas of the contact electrode “feels” a phase transition taking place in the investigated sample. Therefore we observe kinks in the resistivity plot of the contact electrode which easily localize the proper critical temperatures: TC (Gd), TN (Cr) and Tstruct (TiNi, CuZnSn). The proposed method visualizes the prevailing role of the chemical potential at phase transitions and provides a completely new (“remote”) tool to detect critical points in solids. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::596e3630b4f498686e9190d25e4a62ca https://doi.org/10.1002/pssb.200409039 Zobrazit plný text záznamu Plný text