High‐frequency pyromagnetic effect in CoS2−xSexcompounds

Autor:	R. W. Bené, R. M. Walser, M. L. Malwah
Rok vydání:	1975
Předmět:	inorganic chemicals Frequency response Range (particle radiation) Materials science Condensed matter physics Doping General Physics and Astronomy chemistry.chemical_element law.invention chemistry law Eddy current Curie temperature human activities Selenium Doping profile
Zdroj:	Journal of Applied Physics. 46:2250-2256
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.321817
Popis:	In this paper we present the results of the pyromagnetic measurements on CoS2−xSex in the frequency range 100 Hz–10 MHz. The effect of the eddy current losses on the frequency response behavior is calculated and seems to explain the experimental data fairly well. The high‐frequency response measurements also reveal in these compounds the presence of a surface magnetic state with a Curie temperature higher than that of the bulk material. The surface Curie temperature as well as the thickness of the surface region depend on the level of selenium doping. The depth of the surface region increases with higher level of selenium doping and varies from about 0.5 to 25 μ. The cause for the existence of the surface magnetic state is believed to be the selenium deficiency near the surface. A possible selenium doping profile near the surface consistent with our experimental data is also suggested.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9341ae34983d3f373ec67b8b995e7c61 https://doi.org/10.1063/1.321817 Zobrazit plný text záznamu