Phys.org July 1. 2024
A nickel-cobalt-manganese-indium magnetic shape-memory alloy, can be deformed and then returned to its original shape by driving it through a phase transition. When subjected to a magnetic field, the material undergoes a magnetic and structural phase transition, during which it absorbs and releases heat. An international team of researchers (USA – Oak Ridge National Laboratory, Texas A&M University, NIST, Russia) showed that localized magnon-phonon hybrid modes, which are inherently spread across reciprocal space, act as a bridge between phonons and magnons and result in substantial magnetic field–induced shifts in the phonons and alter phase stability. They attributed these modes to the localization of phonons and magnons by antiphase boundaries coupled to magnetic domains. According to the researchers their work provides general insights on how glassiness enhances function as the interplay between short- and long-range correlations is common near ferroic glassy states… read more. Open Access TECHNICAL ARTICLEÂ
Temperature and magnetic field dependence of the TO phonon near the X-point. Credit: SCIENCE ADVANCES, 14 Jun 2024, Vol 10, Issue 24