What question did this study set out to answer?

To investigate how manganese doping and Jahn-Teller distortion alter cation site distributions and magnetic exchange interactions in Mn_x Cu_1−x Co_2 O_4 powders.

August 16, 2022Journal of Physics D Applied Physics

Jahn–Taller distortion on exchange interactions between cations in Mn x Cu1−x Co2O4 system

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Authors

LXLei XuSun Yat-sen University CZCongmian ZhenHebei Normal University ZSZizhou ShuiHebei Normal University

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Implication

Experimental study reveals cation redistributions and enhanced magnetic ordering temperatures in manganese-copper-cobalt oxides, indicating tunable magnetic properties via structural distortion.

Key Points

To investigate how manganese doping and Jahn-Teller distortion alter cation site distributions and magnetic exchange interactions in Mn_x Cu_1−x Co_2 O_4 powders.
Synthesized pure-phase Mn_x Cu_1−x Co_2 O_4 (x = 0, 0.25, 0.5, 0.75, and 1) polycrystalline powders via a low-temperature solid-phase reaction method.
Characterized structural phase transitions, cation redistribution between octahedral and tetrahedral sites, and exchange interactions across varying manganese doping levels.
Mn substitution drove a structural transition from cubic to tetragonal phase, causing octahedral Co3+ ions to migrate into tetrahedral sites as high-spin Co2+ ions.
Increasing Mn content shifted low-doping Cu2+ antiferromagnetic interactions to ferrimagnetic tetrahedral Co2+–octahedral Mn3+ coupling, while high doping induced Jahn-Teller distortion and e_g level splitting that enhanced octahedral Mn interactions.
Magnetic ordering temperature increased from 20 K to 93 K as Mn concentration rose, achieving a maximum exchange bias field of 1.063 kOe.

Cite This Study

Xu et al. (2022) studied this question.

synapsesocial.com/papers/6a83b19607bf35307a99684e https://doi.org/10.1088/1361-6463/ac89fe

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Implication

Experimental study reveals cation redistributions and enhanced magnetic ordering temperatures in manganese-copper-cobalt oxides, indicating tunable magnetic properties via structural distortion.

Jahn–Taller distortion on exchange interactions between cations in Mn x Cu1−x Co2O4 system

Discussion

Member takes

Implication

Key Points

Cite This Study

Jahn–Taller distortion on exchange interactions between cations in Mn x Cu1−x Co2O4 system

Discussion

Member takes

Implication

Key Points

Cite This Study

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