Large variations in the magnetic ordering behavior of EuCu(2)As(2) with the application of external pressure and magnetic field |
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Authors: | Sengupta K Alzamora M Fontes M B Sampathkumaran E V Ramos S M Hering E N Saitovitch E M B Paulose P L Ranganathan R Doert Th Jemetio J P F |
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Institution: | Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India. ksengupta11@gmail.com |
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Abstract: | The influence of external pressure on the electrical transport and magnetic properties of EuCu(2)As(2), crystallizing in a ThCr(2)Si(2)-type structure, is reported. The system is known to be an antiferromagnet below T(N) ≈ 15 K in the absence of external magnetic fields. We find that there is a gradual reduction of T(N) with the application of a magnetic field with an extrapolated value of the critical field of around 18 kOe which can drive T(N) to zero. Electrical resistivity under pressure (<11 GPa) reveals that the magnetic ordering temperature is pushed up dramatically to higher temperatures which is quite interesting if compared with the behavior in isostructural FeAs-based systems containing Eu. Above 7 GPa, the pressure-induced state appears to be ferromagnetic. The results thus reveal interesting changes in the magnetic ordering behavior of this compound with increasing pressure and magnetic fields. |
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