2011
DOI: 10.1002/anie.201102228
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Giant Negative Thermal Expansion in the Iron Perovskite SrCu3Fe4O12

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Cited by 137 publications
(118 citation statements)
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“…This oxide has NTE of α = −82 ppm K −1 at T = 320-380 K (figure 7). A similar NTE was observed for LaCu 3 Fe 4 O 12 [32][33][34], which results from the charge transfer from Fe to Cu upon heating.…”
Section: Atomic Radius Contractionsupporting
confidence: 72%
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“…This oxide has NTE of α = −82 ppm K −1 at T = 320-380 K (figure 7). A similar NTE was observed for LaCu 3 Fe 4 O 12 [32][33][34], which results from the charge transfer from Fe to Cu upon heating.…”
Section: Atomic Radius Contractionsupporting
confidence: 72%
“…This was a theoretical attempt to explain magnetovolume effects from the viewpoint of atomic radius contraction. NTE arising from atomic radius contraction has been discovered recently in perovskite oxides [32][33][34][35] [35] undergoes a first-order phase transition from the larger-volume low-T phase to the smaller-volume high-T phase. The volume change reaches 2.9%.…”
Section: Atomic Radius Contractionmentioning
confidence: 99%
“…Polycrystalline ACu 3 Fe 4 O 12 (A ¼ Ca, Sr, Y and Eu) samples were prepared under high pressure and high temperature conditions of 15e20 GPa, 1000e1200 C [9,10,12]. Note that EuCu 3 Fe 4 O 12 (ECFO) compound displays an intersite charge transfer below 250 K as LCFO does below 393 K (unpublished).…”
Section: Methodsmentioning
confidence: 99%
“…CaCu 3 Fe 4 O 12 (CCFO) and YCu 3-Fe 4 O 12 (YCFO) show charge disproportionation (2Fe 4þ / Fe 3þ þ Fe 5þ ) and a ferrimagnetism resulting from antiferromagnetic interactions between Cu and Fe sublattices, below 210 K and 250 K respectively [9,10]. In contrast, LaCu 3 Fe 4 O 12 (LCFO) and SrCu 3 Fe 4 O 12 (SCFO) demonstrate an intersite charge transfer between Cu and Fe ions (3Cu 2þ þ 4Fe 3.75þ / 3Cu 3þ þ 4Fe 3þ for LCFO and Cu 2þ þ Fe 4þ / Cu 3þ þ Fe 3þ for SCFO) below 393 K and 270 K, respectively [11,12].…”
Section: Introductionmentioning
confidence: 94%
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