Details

Autor(en) / Beteiligte

• Polishchuk, D.M.
• Tovstolytkin, A.I.
• Fertman, Elena
• Desnenko, Vladimir
• Beznosov, Anatoly
• Kajňaková, Marcela
• Feher, Alexander

Titel

Structural first-order transformation in La2/3Ba1/3MnO3: ESR study

Ist Teil von

• Journal of magnetism and magnetic materials, 2012-12, Vol.324 (24), p.4225-4230

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have studied by the electron-spin resonance (ESR) and static magnetic field techniques, the La2/3Ba1/3MnO3 perovskite, which was previously shown to exhibit a martensitic phase transformation in the vicinity of Ts∼200K [Physical Review B 68, 054109 (2003)], leading to its structural phase-segregated state. Resonant absorptions reveal that in the temperature interval from 100K to 340K the compound represents a mixture of two ferromagnetic phases possessing different magnetizations, in varying proportions depending on the temperature, and a small amount of a paramagnetic phase. The results agree well with the previous neutron diffraction study. Applied in the ESR experiments, magnetic fields (2–6kOe) strongly affect the magnetization curves: even magnetic field as high as 700Oe modifies the anomaly in the phase transformation region and removes the difference between the zero-field cooled and field-cooled magnetization curves, which implies that the difference in the magnetic susceptibility of the coexisting phases is small and the magnetic domain configuration can be easily changed. ► The electron-spin resonance study of La2/3Ba1/3MnO3 compound has been done. ► Phase segregated state of the compound below the room temperature was revealed. ► The two different FM phases in varying proportions depending on the temperature are coexistent. ► The phase separation originates from the martensitic transformation in 200K region. ► Magnetic fields up to 6kOe strongly affects the martensitic phase transformation.