Magnetic state of certain iron–chromium–nickel alloys at low temperatures
V. Ya. ll’ichevPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRI. N. KlimenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRE. N. KhatskoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Abstract
The magnetic state of three laboratory alloys of iron, chromium, and 8−25% nickel is examined on the basis of measurement data pertaining to the temperature dependence of their magnetic susceptibility. It is shown that the magnetic state of these iron–chromium–nickel alloys can be described in terms of simultaneous negative and positive exchange interaction between atoms. As the temperature drops, there appear in the alloy superparamagnetic clusters which strongly affect the magnetic susceptibility of the alloy at low temperatures. An increase of the nickel content from 8 to 25%, with the chromium content remaining 18%, results in a change of the magnetic state of these alloys at low temperatures from antiferromagnetic to ferromagnetic.
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