TY - JOUR
T1 - 1:1 Ca2+:Cu2+ A‐site order in a ferrimagnetic double double perovskite
AU - Solana-madruga, Elena
AU - Kearins, Padraig S.
AU - Ritter, Clemens
AU - Arevalo-lopez, Angel M.
AU - Attfield, John Paul
N1 - Funding Information:
We thank EPSRC and STFC for support, and Diamond and the ILL for beamtime provided at I11 and D20 beamlines respectively. Stephen Thompson is acknowledged for assistance on I11 data collection. AMAL thanks the ANR‐AMANTS project (19‐CE08‐0002‐01). Chevreul Institute (FR 2638), Region Hauts‐de‐France, and FEDER are acknowledged for funding the PPMS magnetometer.
Publisher Copyright:
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
PY - 2022/8/8
Y1 - 2022/8/8
N2 - Cation ordering in ABX 3 perovskites is important to structural, physical and chemical properties. Here we report discovery of CaCuFeReO 6 with the tetragonal AA’BB’O 6 double double perovskite structure that was previously only reported for A’ = Mn compositions. CaCuFeReO 6 occurs in the same phase field as CaCu 3 Fe 2 Re 2 O 12 demonstrating that different A-cation ordered peroskites may be obtained in the same chemical system. CaCuFeReO 6 has ferrimagnetic order of Fe, Re and Cu spins below T C = 567 K, in contrast to Mn analogues where the Mn spins order separately at much lower temperatures. The magnetoresistance of CaCuFeReO 6 displays low-field ‘butterfly’ hysteresis with an unusual change from negative to positive values as field increases. Many more AA’BB’O 6 double double perovskites may be accessible for A’ = Cu and other divalent transition metals at high pressure, so the presently known phases likely represent only the ‘tip of the iceberg’ for this family.
AB - Cation ordering in ABX 3 perovskites is important to structural, physical and chemical properties. Here we report discovery of CaCuFeReO 6 with the tetragonal AA’BB’O 6 double double perovskite structure that was previously only reported for A’ = Mn compositions. CaCuFeReO 6 occurs in the same phase field as CaCu 3 Fe 2 Re 2 O 12 demonstrating that different A-cation ordered peroskites may be obtained in the same chemical system. CaCuFeReO 6 has ferrimagnetic order of Fe, Re and Cu spins below T C = 567 K, in contrast to Mn analogues where the Mn spins order separately at much lower temperatures. The magnetoresistance of CaCuFeReO 6 displays low-field ‘butterfly’ hysteresis with an unusual change from negative to positive values as field increases. Many more AA’BB’O 6 double double perovskites may be accessible for A’ = Cu and other divalent transition metals at high pressure, so the presently known phases likely represent only the ‘tip of the iceberg’ for this family.
U2 - 10.1002/anie.202209497
DO - 10.1002/anie.202209497
M3 - Article
SN - 1433-7851
JO - Angewandte Chemie International Edition
JF - Angewandte Chemie International Edition
ER -