Journal ArticleDOI
Two-dimensional magnetic interplay in the tensile-strained LaCoO3 thin films.
Hao Liu,Jiyu Fan,Fengjiao Qian,Yanda Ji,Azizur Rahman,Rujun Tang,Lei Zhang,Langsheng Ling,Yan Zhu,Hao Yang +9 more
Reads0
Chats0
TLDR
In this article, the authors used the modified Arrott plot and critical isotherm analysis to determine the critical exponents, which are β = 0.754(1) with a Curie temperature TC = 79.8(8) K and γ = 1.52(2) with TC= 79.9 (2) K.Abstract:
High-quality epitaxial LaCoO3 (LCO) thin films have been deposited on SrTiO3 (STO) substrates with pulsed laser deposition (PLD). We find that the LCO films undergo a typical ferromagnetic–paramagnetic (FM–PM) phase transition at ∼80 K. To understand the nature of magnetic phase transition, various methods, including the modified Arrott plot and critical isotherm analysis, were used to determine the critical exponents, which are β = 0.754(1) with a Curie temperature TC = 79.8(8) K and γ = 1.52(2) with TC = 79.9(2) K. The reliability of these critical exponents was confirmed using the Widom scaling relation and the scaling hypothesis. Further analysis revealed that the spin coupling within the LCO films exhibits two-dimensional (2D) long-range magnetic interaction and the magnetic exchange distance decays as J(r) ∼ r−(3.46). Our critical behavior analysis may shed new light on the further understanding of the origin of FM and the relatively fixed TC in LCO thin films.read more
Citations
More filters
Journal ArticleDOI
Critical behavior in hexagonal Y2Fe17: magnetic interaction crossover from 3D to 2D Ising model
Jiyu Fan,Jiyu Fan,Can Huang,Hao Liu,Yu-E Yang,Yu-E Yang,J.L. Sánchez Llamazares,C. F. Sánchez Valdés,Pedro Gorria,Chun-Lan Ma,Yan Zhu,Yan Zhu,Hao Yang,Hao Yang +13 more
TL;DR: In this paper, the critical behavior of single phase Y2Fe17 melt-spun ribbons with the Th2Fe 17-type crystal structure has been studied around the transition temperature (TC), where the magnetic properties show a feature changing from three-dimensional to two-dimensional Ising model.
Journal ArticleDOI
Scaling analysis of magnetic-thermal behaviors in ferromagnetic insulator LaCoO3 thin film
Hao Liu,Hao Liu,Jiyu Fan,Jiyu Fan,Huan Zheng,Huan Zheng,Azizur Rahman,Fengjiao Qian,Fengjiao Qian,Caixia Wang,Chunlan Ma,Yan Zhu,Yan Zhu,Hao Yang,Hao Yang +14 more
TL;DR: In this paper, the magnetic entropy change (ΔSM) of LaCoO3 (LCO) thin films under various applied magnetic fields were obtained. And they showed that the critical behavior of LCO thin films may involve complex magnetic interactions, which is correlated with a longterm puzzling finding in this system why its Curie point is always around 80 K regardless of the different fabrication methods and conditions used in the film growth.
Journal ArticleDOI
Critical Behavior of the (111)‐Oriented LaCoO 3 /SrTiO 3 Thin Film
Hao Liu,Hao Liu,Jiyu Fan,Jiyu Fan,Jun Zhao,Fengjiao Qian,Fengjiao Qian,Yan Zhu,Yan Zhu,Chunlan Ma,Azizur Rahman,Lei Zhang,Hao Yang,Hao Yang +13 more
Journal ArticleDOI
Co-optimization of matrix phase and second phase for improved room-temperature TCR of (La0.6Na0.4MnO3)1−xAgx composites
TL;DR: In this article, the electrical transport properties of (La 0.6Na 0.4MnO3) 1−xAgx ((LNMO)1−xAx) composites were investigated via the sol-gel method to investigate their electrical transport property.
Journal ArticleDOI
Adjusting the photoconductive properties of LaCoO3 thin films by epitaxial strain
Haifeng Liu,Baogang Guo,Lin Wang,Ruishi Xie,Jiacheng Yang,Jie Li,Xingquan Zhang,Kui Zheng,Jichuan Huo +8 more
TL;DR: In this article, the tetragonal distortion of CoO6 octahedra results in a decrease of ΔCF as well as Eg, enhancing the photoconductive performance of LaCoO3 thin films.
References
More filters
Journal ArticleDOI
On a generalised approach to first and second order magnetic transitions
Journal ArticleDOI
The theory of equilibrium critical phenomena
TL;DR: The theory of critical phenomena in systems at equilibrium is reviewed at an introductory level with special emphasis on the values of the critical point exponents α, β, γ,..., and their interrelations as mentioned in this paper.
Journal ArticleDOI
Gate-tunable room-temperature ferromagnetism in two-dimensional Fe 3 GeTe 2 .
Yujun Deng,Yujun Deng,Yijun Yu,Yijun Yu,Yichen Song,Yichen Song,Jingzhao Zhang,Naizhou Wang,Naizhou Wang,Zeyuan Sun,Zeyuan Sun,Yangfan Yi,Yangfan Yi,Yizheng Wu,Yizheng Wu,Shiwei Wu,Shiwei Wu,Junyi Zhu,Jing Wang,Jing Wang,Xianhui Chen,Xianhui Chen,Yuanbo Zhang,Yuanbo Zhang +23 more
TL;DR: It is found that the itinerant ferromagnetism persists in Fe3GeTe2 down to the monolayer with an out-of-plane magnetocrystalline anisotropy, which opens up opportunities for potential voltage-controlled magnetoelectronics based on atomically thin van der Waals crystals.
Journal ArticleDOI
Criterion for Ferromagnetism from Observations of Magnetic Isotherms
TL;DR: In this article, a criterion for determining the onset of ferromagnetism in a material as its temperature is lowered from a region in which the linearity of its magnetic moment versus field isotherm gives an indication of paramagnetisms.
Journal ArticleDOI
Equation of State in the Neighborhood of the Critical Point
TL;DR: In this paper, a specific form for the equation of state of a fluid near its critical point is proposed, where a function Φ(x, y) is introduced, with x a measure of the temperature and y of the density.
Related Papers (5)
Evolution of critical scaling behavior near a ferromagnetic quantum phase transition.
Nicholas P. Butch,M. B. Maple +1 more