title: Competing magnetic phases in La(0.7)Sr(0.3)MnO(3) as deduced from Mn site hyperfine parameters.
abstract: Time differential perturbed angular correlation measurements using the (181)Ta probe in La(0.7)Sr(0.3)Mn(0.995)Hf(0.005)O(3) reveal the presence of two distinct hyperfine components, identified with probe atoms occupying Mn sites which are rich and deficient in hole concentration. The Mn(4+) rich zones exhibit ferromagnetic ordering at all temperatures below 360 K, the bulk Curie temperature. In the case of Mn(4+) deficient zones, the paramagnetic order is seen to evolve into a canted antiferromagnetic ordering below 360 K, that becomes ferromagnetic below 250 K. Concomitantly, there is a change in the fractions below 250 K. The implications of these results are discussed in terms of electronic phase separation.
authors.affiliation: Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603 102, India.
authors.forename: R
authors.initials: R
authors.lastname: Govindaraj
authors.forename: C S
authors.initials: CS
authors.lastname: Sundar