Observation of Large Low‐Field Magnetoresistance in Layered (NdNiO<sub>3</sub>)<i><sub>n</sub></i>:NdO Films at High Temperatures
Abstract
AbstractLarge low‐field magnetoresistance (LFMR, < 1 T), related to the spin‐disorder scattering or spin‐polarized tunneling at boundaries of polycrystalline manganates, holds considerable promise for the development of low‐power and ultrafast magnetic devices. However, achieving significant LFMR typically necessitates extremely low temperatures due to diminishing spin polarization as temperature rises. To address this challenge, one strategy involves incorporating Ruddlesden–Popper structures (ABO3)n:AO, which are layered derivatives of perovskite structure capable of potentially inducing heightened magnetic fluctuations at higher temperatures. Here, a remarkable LFMR of up to 1.0×103% is obtained in the layered (NdNiO3)n:NdO films with a high and wide temperature range (190–240 K). This finding underlines that the layered (NdNiO3)n:NdO (n = 1) structure show a complex magnetic structure above TMI of perovskite NdNiO3, where small ferromagnetic domains are embedded in the antiferromagnetic domains, raising the tunneling barriers and magnetic fluctuations at high temperatures. Furthermore, applying a low magnetic field (<0.1 T) near TMI effectively mitigates the disruption of antiferromagnetic order structures at boundaries, then a higher temperature is required to break the inhibition of ferromagnetic to antiferromagnetic phase transition. The results contribute significantly to the advancement of magnetic devices capable of achieving substantial LFMR at room temperature.
Article Details
Authors (17)
Yanan Zhao
State Key Laboratory of Organometallic Chemistry
Yufei Yao
State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
Ping Li
Zhilu Ye
The Key Laboratory of Biomedical Information Engineering of Ministry of Education Center for Mitochondrial Biology and Medicine School of Life Science and Technology International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi'an Key Laboratory for Biomedical Testing and High‐end Equipment Xi'an Jiaotong University Xi'an Shannxi 710049 China
Minye Yang
State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
Zicong Zhou
State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
Guannan Yang
State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an 710049 China
Lin Han
Zidong Wang
School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518172 China
Yan Zhou
Jingrui Li
Haixia Liu
Guohua Dong
State Key Laboratory for Mechanical Behavior of Materials Electronic Materials Research Laboratory School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an China
Bin Peng
Agroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois Urbana-Champaign
Qian Li
Zhixin Guo
State Key Laboratory for Mechanical Behavior of Materials and School of Materials Science and Engineering, Xi'an Jiaotong University 2 , Xi'an, Shaanxi 710049,
Ming Liu