A re-entrant canted antiferromagnetic state in the Mn site substituted manganite La0.46Sr0.54Mn0.98Cr0.02O3Sunil Nair1 and A. K. Nigam2
1 Max Planck Institute for Chemical Physics of Solids - Noethnitzer Str. 40, 01187 Dresden, Germany, EU
2 Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research Homi Bhabha Road, Mumbai 400 005, India
received 20 June 2008; accepted in final form 23 September 2008; published November 2008
published online 28 October 2008
We report an investigation of the higher-order magnetic susceptibilities, measured across a low-temperature metastable magnetic phase transition in La0.46Sr0.54Mn0.98Cr0.02O3. Measurements of the second- and third-order magnetic susceptibilities clearly indicate that this re-entrant transition is associated with the emergence of a finite spontaneous magnetisation as in a canted antiferromagnet. The large relaxation time scales seen in this system probably originate from self-generated clusters which arise as a consequence of Cr substitution in the host antiferromagnetic lattice.
75.47.Lx - Manganites.
75.50.Lk - Spin glasses and other random magnets.
75.30.Kz - Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.).
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