Magnetic properties and specific heat of LaMn<SUB>1-x</SUB>Ti<SUB>x</SUB>O<SUB>3+δ</SUB> (0 <x ≤0.2)
- Sahana, M.
- Venimadhav, A.
- Hegde, M. S.
- Nenkov, K.
- Robler, U. K.
- Dorr, K.
- Muller, K. -H.
DOIAbstract
We present a magnetic study of the insulating perovskite LaMn1-xTixO3+δ (0<x≤0.2) including measurements of magnetization, susceptibility, and magnetic relaxation. The Curie temperature was found to decrease with increasing content of Ti. Two distinct magnetic transitions, irreversibility, non-exponential relaxation and aging effects confirm a reentrant spin-glass state for x=0.2. The time decay of the magnetization has an algebraic functional form for times up to 2 h. The specific heat also displays characteristic features of a spin-glass system by a linear low-temperature dependence and a broadened peak near the temperature of the reentrant transition
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