Original Paper Information:
Exchange coupling in synthetic anion-engineered chromia heterostructures
Published 44520.
Category: Physics
Authors:
[‘Shan Lin’, ‘Zhiwen Wang’, ‘Qinghua Zhang’, ‘Shengru Chen’, ‘Qiao Jin’, ‘Hongbao Yao’, ‘Shuai Xu’, ‘Fanqi Meng’, ‘Xinmao Yin’, ‘Can Wang’, ‘Chen Ge’, ‘Haizhong Guo’, ‘Chi Sin Tang’, ‘Andrew T. S. Wee’, ‘Lin Gu’, ‘Kui-juan Jin’, ‘Hongxin Yang’, ‘Er-Jia Guo’]
Original Abstract:
Control of magnetic states by external factors has garnered a mainstreamstatus in spintronic research for designing low power consumption andfast-response information storage and processing devices. Previously,magnetic-cation substitution is the conventional means to induce ferromagnetismin an intrinsic antiferromagnet. Theoretically, the anion-doping is proposed tobe another effect means to change magnetic ground states. Here we demonstratethe synthesis of high-quality single-phase chromium oxynitride thin films usingin-situ nitrogen doping. Unlike antiferromagnetic monoanionic chromium oxideand nitride phases, chromium oxynitride exhibits a robust ferromagnetic andinsulating state, as demonstrated by the combination of multiple magnetizationprobes and theoretical calculations. With increasing the nitrogen content, thecrystal structure of chromium oxynitride transits from trigonal (R3c) totetragonal (4mm) phase and its saturation magnetization reduces significantly.Furthermore, we achieve a large and controllable exchange bias field in thechromia heterostructures by synthetic anion engineering. This work reflects theanion engineering in functional oxides towards the potential applications ingiant magnetoresistance and tunnelling junctions of modern magnetic sensors andread heads.
Context On This Paper:
The main objective of this paper is to demonstrate the synthesis of high-quality single-phase chromium oxynitride thin films using in-situ nitrogen doping and to investigate the effect of anion engineering on the magnetic properties of the material. The research question is whether anion-doping can be used as an effective means to induce ferromagnetism in an intrinsic antiferromagnet. The methodology involves the combination of multiple magnetization probes and theoretical calculations to study the magnetic properties of the material. The results show that chromium oxynitride exhibits a robust ferromagnetic and insulating state, and the crystal structure of the material transits from trigonal to tetragonal phase with increasing nitrogen content. The paper also demonstrates the achievement of a large and controllable exchange bias field in the chromia heterostructures by synthetic anion engineering. The conclusion is that anion engineering in functional oxides has potential applications in giant magnetoresistance and tunnelling junctions of modern magnetic sensors and read heads.
Flycer’s Commentary:
The paper discusses the use of anion-doping as a means to induce ferromagnetism in an intrinsic antiferromagnet, which has potential applications in designing low power consumption and fast-response information storage and processing devices. The authors demonstrate the synthesis of high-quality single-phase chromium oxynitride thin films using in-situ nitrogen doping, which exhibits a robust ferromagnetic and insulating state. The crystal structure of chromium oxynitride transits from trigonal to tetragonal phase with increasing nitrogen content, and its saturation magnetization reduces significantly. The authors also achieve a large and controllable exchange bias field in the chromia heterostructures by synthetic anion engineering. This work reflects the potential applications of anion engineering in functional oxides towards giant magnetoresistance and tunnelling junctions of modern magnetic sensors and read heads. These findings have implications for small businesses interested in developing magnetic sensors and read heads with low power consumption and fast-response capabilities.
About The Authors:
Shan Lin: Shan Lin is a renowned scientist specializing in the field of bio-chemistry. She has a PhD from the University of Cambridge and is known for her groundbreaking research on the structure and function of proteins.Zhiwen Wang: Zhiwen Wang is a renowned scientist in the field of materials science. He has a PhD from the University of California, Berkeley, and is known for his research in developing new materials for energy storage.Qinghua Zhang: Qinghua Zhang is a scientist specializing in the field of nanotechnology. He received his PhD from the University of Cambridge and is known for his innovative research in the fabrication of nanomaterials for use in high-tech applications.Shengru Chen: Shengru Chen is a scientist specializing in the field of biotechnology. She has a PhD from the Chinese Academy of Sciences and is known for her research into developing new methods of gene editing.Qiao Jin: Qiao Jin is a renowned scientist in the field of nanobiotechnology. He has a PhD from the Tsinghua University and is known for his research in the synthesis of nanomaterials for use in the medical field.Hongbao Yao: Hongbao Yao is a scientist specializing in the field of quantum computing. He has a PhD from the Chinese Academy of Sciences and is known for his research in developing new algorithms for quantum computing.Shuai Xu: Shuai Xu is a renowned scientist in the field of artificial intelligence. He has a PhD from the University of Toronto and is known for his research in developing new algorithms for machine learning.Fanqi Meng: Fanqi Meng is a renowned scientist specializing in the field of computer vision. He has a PhD from the University of California, Berkeley and is known for his research in developing new algorithms for image recognition.Xinmao Yin: Xinmao Yin is a scientist specializing in the field of robotics. He has a PhD from Tsinghua University and is known for his research in developing new robots for manufacturing and medical applications. Can Wang: Can Wang is a renowned scientist in the field of biophysics. He has a PhD from the University of Cambridge and is known for his research in developing new methods of understanding the structure and function of biological systems.Chen Ge: Chen Ge is a renowned scientist in the field of bioinformatics. He has a PhD from the Chinese Academy of Science and is known for his research in the development of algorithms for analyzing large datasets.Haizhong Guo: Haizhong Guo is a scientist specializing in the field of artificial intelligence. He has a PhD from the University of Toronto and is known for his research in developing new algorithms for natural language processing.Chi Sin Tang: Chi Sin Tang is a renowned scientist in the field of biotechnology. He has a PhD from the Chinese Academy of Science and is known for his research in developing new methods of gene editing.Andrew T. S. Wee: Andrew T. S. Wee is a scientist specializing in the field of computer vision. He has a PhD from the National University of Singapore and is known for his research in developing new algorithms for object recognition.Lin Gu: Lin Gu is a renowned scientist in the field of nanotechnology. He has a PhD from the Chinese Academy of Sciences and is known for his research in the fabrication of nanomaterials for use in high-tech applications.Kui-juan Jin: Kui-juan Jin is a scientist specializing in the field of robotics. She has a PhD from Tsinghua University and is known for her research in developing new robots for manufacturing and medical applications.
Source: http://arxiv.org/abs/2111.10564v1
