2010
DOI: 10.1111/j.1551-2916.2010.03734.x
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Microstructural Origin of Magnetic and Giant Dielectric Behavior of Sr2MnTiO6−δ Perovskite Nanocrystals

Abstract: Polycrystalline Sr2MnTiO6−δ (SMTO) nanosized powders have been prepared by the liquid mix technique. Thermogravimetric experiments show the presence of small amounts (4%) of Mn3+ in the sample. A systematic structural study shows the stabilization of nanocrystals of about 50 nm, which crystallize in an space group Pm3m, i.e. the arystotype perovskite. Microstructural analysis permits us to interpret the electrical and magnetic properties in terms of a high degree of structural disorder including intergrowths. … Show more

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Cited by 17 publications
(10 citation statements)
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“…If the valence of two B cations is equal, both cations occupy randomly B and B sites, an effect known as anti-site-disorder (ASD). This is the case in the parent compound Sr 2 The parent compound Sr 2 MnTiO 6 is formed by nanosized cubic crystals with random distribution of ions (Mn or Ti) on the perovskite B-site [14] in spite of showing extended regions of different symmetries coexisting in the same crystals. Both Mn and Ti ions have the same valence (4+) yielding a complete ASD that permits Mn-rich and Ti-rich clusters.…”
Section: Discussionmentioning
confidence: 96%
See 1 more Smart Citation
“…If the valence of two B cations is equal, both cations occupy randomly B and B sites, an effect known as anti-site-disorder (ASD). This is the case in the parent compound Sr 2 The parent compound Sr 2 MnTiO 6 is formed by nanosized cubic crystals with random distribution of ions (Mn or Ti) on the perovskite B-site [14] in spite of showing extended regions of different symmetries coexisting in the same crystals. Both Mn and Ti ions have the same valence (4+) yielding a complete ASD that permits Mn-rich and Ti-rich clusters.…”
Section: Discussionmentioning
confidence: 96%
“…The unit cell of double perovskites A 2 B B O 6 in its simplest form is cubic, containing two corner-sharing, B O 3 and B O 3 octahedra. In the search for novel materials with a high dielectric constant, the double perovskite Sr 2 MnTiO 6 was synthesized in 2008 [13,14]. Additional promising properties can be achieved by a partial replacement of strontium with gadolinium: Sr 2−x Gd x MnTiO 6 [15].…”
Section: Introductionmentioning
confidence: 99%
“…x =0, by doping with gadolinium. In this x =0 phase, FM weak interactions at low temperatures were detected, which were interpreted as a consequence of a spin‐glass type frustration behavior 8 . When Gd is introduced, the presence of two magnetic sublattices, composed of the transition metal and the rare‐earth cations, will lead to nonnegligible effects, giving rise to complex magnetic behavior.…”
Section: Introductionmentioning
confidence: 98%
“…Recently, giant dielectric behavior was reported in a new double‐perovskite Sr 2 TiMnO 6 (STMO) ceramics . Two dielectric relaxations were found in the temperature range from 180 to 300 K. These relaxations were attributed to the Maxwell–Wagner type relaxation due to grain boundary and electrode responses .…”
Section: Introductionmentioning
confidence: 99%
“…7,8 Recently, giant dielectric behavior was reported in a new double-perovskite Sr 2 TiMnO 6 (STMO) ceramics. [9][10][11] Two dielectric relaxations were found in the temperature range from 180 to 300 K. These relaxations were attributed to the Maxwell-Wagner type relaxation due to grain boundary and electrode responses. 9 Dc conductivity was found to follow a variable range hopping behavior below 180 K, 9 indicative a polaron nature of the charge carriers in the sample.…”
Section: Introductionmentioning
confidence: 99%