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A phenomenon of magnetization reversal in response to an applied magnetic field is very common and forms the basis of magnetic memories. In contrast, a phenomenon of magnetization reversal in response to a temperature change is rarer. In this work, we demonstrated a pronounced negative magnetization effect (NME) during field-cooled measurements in small magnetic fields in members of the A-site columnar-ordered quadruple perovskites, Ce2MnM(Mn2Sb2)O12 with M = Mn and Zn, which were prepared by a high-pressure, high-temperature method at about 6 GPa and about 1600 K. Their crystal structures at room temperature were investigated with synchrotron X-ray powder diffraction data. Both compounds crystallize in space group P42/n (No. 86) with full rock-salt ordering of Mn and Sb at the B sites. Lattice parameters are a = 7.84545(1) Å and c = 7.95529(2) Å for M = Mn and a = 7.81270(1) Å and c = 7.94100(1) Å for M = Zn. The bond-valence sum analysis and the charge balance suggest that cerium is present in the oxidation state of +3. They show one magnetic transition at TC = 52 K with the compensation point near 20 K for M = Mn, and at TC = 34 K with the compensation point near 29 K for M = Zn. A robust, intrinsic NME was also observed on zero-field-cooled curves when measured in small magnetic fields. The NME could originate from their ferrimagnetic structures.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: A-site columnar-ordered perovskites, B-site double ordering, negative magnetization, magnetic properties, ferrimagnet, synchrotron diffraction

刊行年月日: 2025-06-02

出版者: American Chemical Society (ACS)

掲載誌:

• Inorganic Chemistry (ISSN: 1520510X) vol. 64 issue. 21 p. 10467-10477

研究助成金:

• Japan Society for the Promotion of Science JP25K01657

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.inorgchem.5c00653

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更新時刻: 2025-11-07 16:50:05 +0900

MDRでの公開時刻: 2025-11-08 08:21:16 +0900