We present a study performed on several LaMnO3+x/2 compositions. Detailed analysis around x = 0.09 detects phase separation between a higher transition, T-c, and a lower one T-N, with coexisting fluctuating and magnetically ordered clusters (the Neel point, T-N, being the onset of an inhomogeneous non-collinear antiferromagnetic order detected by neutrons). The ordered clusters give rise to an extremely fast, static Kubo-Toyabe muon depolarization, while mixed static and dynamic local fields are detected inside the fluctuating clusters. Below T-N precession frequency lines are resolved, despite the huge broadening introduced by localized Mn4+ ordered moments. A phase diagram is obtained and briefly discussed in the context of electronic phase separation.

Phase diagram of low doping manganites / DE RENZI, Roberto; Allodi, Giuseppe; Amoretti, Giuseppe; CESTELLI GUIDI, M.; Fanesi, S.; Guidi, Germano; F., Licci; A., Caneiro; F., Prado; R., Sanchez; S., Oseroff; A., Amato. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - 289-290:(2000), pp. 85-88. [10.1016/S0921-4526(00)00268-4]

Phase diagram of low doping manganites

DE RENZI, Roberto;ALLODI, Giuseppe;AMORETTI, Giuseppe;GUIDI, Germano;
2000-01-01

Abstract

We present a study performed on several LaMnO3+x/2 compositions. Detailed analysis around x = 0.09 detects phase separation between a higher transition, T-c, and a lower one T-N, with coexisting fluctuating and magnetically ordered clusters (the Neel point, T-N, being the onset of an inhomogeneous non-collinear antiferromagnetic order detected by neutrons). The ordered clusters give rise to an extremely fast, static Kubo-Toyabe muon depolarization, while mixed static and dynamic local fields are detected inside the fluctuating clusters. Below T-N precession frequency lines are resolved, despite the huge broadening introduced by localized Mn4+ ordered moments. A phase diagram is obtained and briefly discussed in the context of electronic phase separation.
Phase diagram of low doping manganites / DE RENZI, Roberto; Allodi, Giuseppe; Amoretti, Giuseppe; CESTELLI GUIDI, M.; Fanesi, S.; Guidi, Germano; F., Licci; A., Caneiro; F., Prado; R., Sanchez; S., Oseroff; A., Amato. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - 289-290:(2000), pp. 85-88. [10.1016/S0921-4526(00)00268-4]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/1457689
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