Determination of Pressure in Helium Bubbles and Surface Energy of Nickel by Ferromagnetic Resonance Method
O. I. Spol’nik, A. Yu. Haydus’, L. M. Kaliberda
Kharkiv Petro Vasylenko National Technical University of Agriculture, 44 Alchevskykh Str., UA-61002 Kharkiv, Ukraine
Received: 29.10.2018; final version - 18.01.2021. Download: PDF
The data on the effect of pores surrounded by fields of elastic strains on the line width of ferromagnetic resonance (FMR) are experimentally obtained. For this purpose, FMR line widths are measured in nickel samples irradiated with accelerated helium ions and thereafter subjected to isochronous step annealing at different temperatures. As a result of annealing, an ensemble of helium bubbles with known concentration and size is created in the samples. Resonance measurements in these samples are revealed broadening of the FMR line, the value of which agrees well with the theory of broadening of the resonance line by stressed pores. This makes it possible to estimate the pressure of helium in the bubbles and the surface energy of nickel from the magnitude of this broadening.
Key words: ferromagnetic resonance, ion irradiation, pressure of gas, surface energy of nickel.
PACS: 61.72.Qq, 61.80.Jh, 61.82.Bg, 68.03.Cd, 68.35.Md, 76.50.+g, 81.40.Ef
Citation: O. I. Spol’nik, A. Yu. Haydus’, and L. M. Kaliberda, Determination of Pressure in Helium Bubbles and Surface Energy of Nickel by Ferromagnetic Resonance Method, Metallofiz. Noveishie Tekhnol., 43, No. 6: 843—851 (2021) (in Ukrainian)