Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Measurement of Hydrogen in Metal Alloys by Magnetic and Electronic Techniques



P. Termsuksawad, S. Niyomsoan, Ronald B. Goldfarb, V I. Kaydanov, David Olson, B. Mishra, Z Gavra


As demonstrated in this paper, magnetic and electronic measurements can be used to quantify hydrogen availability, absorption, and desorption in materials for nickel metal-hydride batteries and hydrogen storage. The ability of a metal alloy to absorb and desorb hydrogen depends on the interaction of the metal's electronic d- and f-bands with electrons donated or accepted by the hydrogen. The tendency of alloys to dissolve hydrogen and form hydrides depends on their performance as electron acceptors. Absorbed hydrogen may exist in either soluble (protonic) or bound phases. Magnetization and thermoelectric (Seebeck) coefficient were measured as functions of hydrogen content in powdered AB5- and AB2-type alloys. Magnetization decreases with increasing soluble hydrogen in ferromagnetic AB5-type (La-Ce)(Ni-Mn)5 and (La-Nd)(Ni-Co-Mn)5. However, magnetization increases with increasing soluble hydrogen in AB2-type (Zr-Ti)(Cr-Fe)2. Finally, magnetization does not change with increasing bound hydrogen in AB2-type (Zr-Ti)(Ni-Mn-V-Cr)2. The Seebeck coefficient for AB5-type (La-Nd)(Ni-Co-Mn)5 is a monotonically decreasing function of hydrogen content. However, the effect of absorbed hydrogen on the Seebeck coefficient of the AB2 alloys depends on whether the hydrogen is soluble or bound.
Journal of Alloys and Compounds


electronic structure, hydrogen absorption, magnetic measurements, magnetization, metal hydrides, Seebeck effect, thermopower


Termsuksawad, P. , Niyomsoan, S. , Goldfarb, R. , Kaydanov, V. , Olson, D. , Mishra, B. and Gavra, Z. (2004), Measurement of Hydrogen in Metal Alloys by Magnetic and Electronic Techniques, Journal of Alloys and Compounds, [online], (Accessed April 21, 2024)
Created December 31, 2003, Updated October 12, 2021