2016/04/29 by P Dutta, P. Dutta, S Pramanick +5
Materials Science · Physics and Astronomy · #Alloy #Antiferromagnetism #Exchange bias #Ferromagnetism #Hydrostatic equilibrium #Hydrostatic pressure #Magnetic Properties and Applications #Magnetic and transport properties of perovskites and related materials #Magnetic refrigeration #Phase transition #Shape Memory Alloy Transformations #cond-mat.str-el
paper · pdf · doi:10.1088/0022-3727/49/38/385001
5 pages
arxiv created 2016/04/29 · openalex created_date 2016/06/24 · openalex publication_date 2016/08/24 · arxiv updated 2016/09/21 · openalex updated_date 2026/08/05
The magnetic and magneto-functional behavior of a Fe-doped MnNiGe alloy with nominal composition Mn 0.85 Fe 0.15 NiGe have been investigated in ambient as well as in high pressure conditions. The alloy undergoes a first order martensitic phase transition (MPT) around 200 K and also shows a large conventional magnetocaloric effect (MCE) ( J kg −1 K −1 for magnetic field ( H ) changing from 0–50 kOe) around the transition in ambient conditions. The application of external hydrostatic pressure ( P ) results in a shift in MPT towards the lower temperature and a clear decrease in the saturation moment of the alloy at 5 K. The peak value of MCE is also found to decrease with increasing external P (∼18 J kg −1 K −1 decrease in has been observed for P = 12.5 kbar). The most interesting observation is the occurrence of the exchange bias effect (EBE) on application of external P . The competing ferromagnetic and antiferromagnetic interaction in the presence of external P plays the pivotal role towards the observation of P induced EBE.