Z
Zhao, Haoting
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High-Pressure Synthesis of Semiconducting PbCu3Mn4O12 with Near-Room-Temperature Ferrimagnetic Order

Abstract

A transition-metal oxide of PbCu3Mn4O12 was prepared at 1523 K and 10 GPa. An A-site-ordered quadruple perovskite structure with the space group Im3 is assigned for this compound. Based on bond-valence-sum calculations and X-ray absorption spectroscopy, the charge combination is determined to be PbCu32+Mn44+O12. Due to Cu2+(up arrow)-Mn4+(down arrow) antiferromagnetic coupling, a near-room-temperature ferrimagnetic phase transition is observed at approximately 287 K. PbCu3Mn4O12 exhibits a semiconducting electric transport property with the energy band gap E-g approximate to 0.2 eV. In addition, considerable low-field magnetoresistance effects are observed at lower temperatures. This study provides an intrinsic near-room-temperature ferrimagnetic semiconductor that exhibits potential applications in next-generation spintronic devices.

article Article
date_range 2024
language English
link Link of the paper
format_quote
Z
Zhao Haoting
L
Lu Dabiao
W
Wang Xiao
Y
Ye Xubin
Z
Zhang Jie
P
Pi Maocai
P
Pan Zhao
C
Chin Yi-Ying
C
Chen Chien-Te
H
Hu Zhiwei
L
Long Youwen
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