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Abstract:
Orthorhombic single crystals of TbMn0.5Fe0.5O3 are found to exhibit
spin-reorientation, magnetization reversal, and weak ferromagnetism.
Strong anisotropy effects are evident in the temperature dependent
magnetization measurements along the three crystallographic axes a, b,
and c. A broad magnetic transition is visible at T-N(Fe/Mn) = 286K due
to paramagnetic to A(x)G(y)C(z) ordering. A sharp transition is observed
at T-SR(Fe/Mn) = 28 K, which is pronounced along c axis in the form of a
sharp jump in magnetization where the spins reorient to G(x)A(y)F(z)
configuration. The negative magnetization observed below T-SR(Fe/Mn)
along c axis is explained in terms of domain wall pinning. A component
of weak ferromagnetism is observed in field-scans along c-axis but below
28 K. Field-induced steps-like transitions are observed in hysteresis
measurement along b axis below 28 K. It is noted that no sign of
Tb-order is discernible down to 2K. TbMn0.5Fe0.5O3 could be highlighted
as a potential candidate to evaluate its magneto-dielectric effects
across the magnetic transitions. (C) 2015 AIP Publishing LLC.
