Article
Physics, Fluids & Plasmas
Jozef Genzor, Andrej Gendiar, Tomotoshi Nishino
Summary: This study investigates the phase transition of the classical Ising model on the Sierpiński carpet, which has a fractal dimension of approximately 1.8927, using an adapted variant of the higher-order tensor renormalization group method. A second-order phase transition is observed at the critical temperature Tc of approximately 1.478. The position dependence of local functions is studied by inserting impurity tensors at different locations on the fractal lattice. The critical exponent ss associated with the local magnetization varies significantly depending on lattice locations, while Tc remains unaffected. Furthermore, automatic differentiation is employed to accurately and efficiently compute the average spontaneous magnetization per site, yielding a global critical exponent of approximately 0.135.
Article
Materials Science, Multidisciplinary
E. Dominguez, C. E. Lopetegui, Roberto Mulet
Summary: The quantum cluster variational method (QCVM) was used to study the J(1) -J(2) model for quantum Ising spins, revealing that quantum fluctuations can alter the order of the transition, introducing a gap between the ferromagnetic and the stripe phases, and leading to the emergence of a nematic phase when both longitudinal and transverse fields are present.
Article
Physics, Multidisciplinary
N. Jiang, Y. Nii, H. Arisawa, E. Saitoh, J. Ohe, Y. Onose
Summary: Chirality in a helimagnetic structure is determined by the direction of magnetic moment rotation, and this information persists even after transitioning to a high-temperature ferromagnetic phase. Study on the 2nd harmonic resistivity rho(2f) reveals insights into chirality characteristics under different magnetic states, with the chirality memory effect possibly originating from ferromagnetic domain walls.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Sergii Burylov, Danil Petrov, Veronika Lackova, Katarina Zakutanska, Natalia Burylova, Alexey Voroshilov, Vyacheslav Skosar, Filippo Agresti, Peter Kopcansky, Natalia Tomasovicova
Summary: This paper presents complete theoretical and experimental studies on electrically and magnetically induced orientational transitions in suspensions of goethite nanorods in a nematic liquid crystal. Different types of samples with varied magnetic properties are prepared and observed. The magnetically induced transitions exhibit distinct orientational behaviors in the samples, with the compensated ferronematic requiring a higher magnetic field for the Freedericksz transition compared to pure nematic, and the magnetized ferronematic showing measurable response to magnetic fields even below the Freedericksz threshold.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Hao-Jia Wu, Yu-Lu Wan, Zhao-Yi Zeng, Cui-E Hu, Xiang-Rong Chen, Hua-Yun Geng
Summary: The structural, electronic, and magnetic properties of vanadium disulfide VS2 monolayers were studied using first-principles calculations and Monte Carlo simulations. The results showed that the VS2 monolayer is dynamically and thermodynamically stable. The effects of carrier concentrations on spin gap, spin polarization, and magnetic axis were explored, and it was found that appropriate hole doping can reverse the magnetic axis and maintain high spin polarization.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Mathematics, Interdisciplinary Applications
Djordje Spasojevic, Sanja Janicevic
Summary: This study investigates the effect of finite driving by a time-varying external magnetic field in a two-dimensional disordered ferromagnetic system, using the case of the nonequilibrium athermal random field Ising model. The response of the studied systems is rate-dependent and exhibits scaling and data collapsing above the dynamical critical point, as long as the system parameters satisfy both the finite-size and rate-dependent scaling conditions. These findings are derived from extensive numerical simulations of large systems, providing reliable evidence for the observed behavior, and could be relevant to real thin systems driven at finite rates.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Materials Science, Multidisciplinary
Alisha Rohal, Asmita Shah, Mayanglambam Manolata Devi, Suvankar Chakraverty, Bhanu Prakash
Summary: A new type of nickel vanadium (Ni:V) LDH material with a ferromagnetic-insulating state has been synthesized via hydrothermal methods, showing potential for various applications and opening a new research path in the field of magnetic/electrostatic memory materials.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Fluids & Plasmas
L. A. Fernandez, I. Gonzalez-Adalid Pemartin, V. Martin-Mayor, G. Parisi, F. Ricci-Tersenghi, T. Rizzo, J. J. Ruiz-Lorenzo, M. Veca
Summary: A growing body of evidence confirms the tenets of Bray and Roberts's theory by studying the Ising spin glass and its correlation length.
Article
Physics, Multidisciplinary
Yu-Qing Huang, Peng-Yu Zheng, Rui Liu, Xi-Tong Xu, Zi-Yang Wu, Chao Dong, Jun-Feng Wang, Zhi-Ping Yin, Shuang Jia
Summary: We conducted a comparative study of the magnetic and transport properties of single-crystalline LaCo2As2 and NdCo2As2. LaCo2As2 exhibits purely intrinsic anomalous Hall effect, while NdCo2As2 shows pronounced sign reversal and multiple hysteresis loops in magnetization, Hall resistivity, and magnetoresistance due to complicated magnetic structural changes. The Hall effect in NdCo2As2 originates from the Co sub-lattice and provides a unique opportunity to explore the magnetic interaction between 4f and 3d electrons.
Review
Physics, Applied
Yusuf Yuksel, Erol Vatansever
Summary: This article reviews the characteristics of ferromagnetic systems under the influence of time-dependent magnetic fields. It is found that dynamic phase transitions and thermodynamic phase transitions belong to the same universality class and have similar phase diagrams. Metamagnetic anomalies exist in the dynamically paramagnetic phase near the critical point. Caution should be taken when dealing with thermodynamic and dynamic phase transitions in the presence of surfaces.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Muhammad Alief Irham, Fahdzi Muttaqien, Satria Zulkarnaen Bisri, Ferry Iskandar
Summary: The study found that a single iron vacancy in hexagonal iron sulfide (h-FeS) could induce a midgap state, explaining the low experimental band gap value observed. A semiconductor-to-metal transition was observed in h-FeS with higher iron vacancy concentration showing better conductivity. Iron vacancies induced a magnetic moment on antiferromagnetic h-FeS, which could benefit the tuning of material's magnetic properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Suvi Santa-aho, Mari Honkanen, Sami Kaappa, Lucio Azzari, Andrey Saren, Kari Ullakko, Lasse Laurson, Minnamari Vippola
Summary: This study thoroughly characterized two types of steels, ferrite and ferrite-pearlite, using multi-instrumental microscopy techniques to obtain detailed information about their microstructure and magnetic structure. The researchers observed the motion of magnetic domain walls and their interactions with different pinning sites, which provided explanations for changes in sample magnetization. The findings have significant implications for the non-destructive Barkhausen noise technique.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Inorganic & Nuclear
Jia-bing Wu, Rui-Kang Huang, Kiyonori Takahashi, Takayoshi Nakamura
Summary: The study found that [MnCr(oxalate)(3)](-) crystal possesses a ferromagnetic network and its crystal-to-crystal transformation provides a strategy for designing multifunctional materials where additional functions arise from molecular dynamics.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Ke Pei, Shanshan Liu, Liting Yang, Enze Zhang, Ruixuan Zhang, Chendi Yang, Linfeng Ai, Zihan Li, Faxian Xiu, Renchao Che
Summary: The study investigates the behavior of magnetic domains in the high-Curie temperature two-dimensional magnetic material Fe3GeTe2 under the drive of pulses, revealing complex dynamic processes due to multiple stable states of the magnetic structure. Cluster of domain walls are found to be more stable and move more synchronously under pulse current drive, which poses a challenge in race track memory devices and reinforces the potential of two-dimensional magnetic materials in application research.
Article
Chemistry, Physical
T. Eto, X. Xu, T. Ito, F. Honda, D. X. Li, G. Oomi, F. Nakamura, H. Masumoto, R. Kainuma, T. Kanomata
Summary: This study experimentally investigated the phase transitions of Ni2+xMnGa1-x alloys and constructed experimental phase diagrams for these alloys. The results show that there are remarkable composition dependencies for characteristic temperatures, such as Curie temperature and martensitic transition temperature, with increasing x. The study also observed magnetostructural coupling in a specific composition range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
R. B. Stinchcombe, S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz, R. R. dos Santos, R. B. Stinchcombe
Article
Physics, Fluids & Plasmas
R. B. Stinchcombe, S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
R. B. Stinchcombe, S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz
Article
Physics, Fluids & Plasmas
R. B. Stinchcombe, S. L. A. de Queiroz, M. A. G. Cunha, Belita Koiller
Article
Physics, Condensed Matter
Sergio L. A. de Queiroz
EUROPEAN PHYSICAL JOURNAL B
(2020)
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz
Summary: This study examines the statistics of selected rare events in a classical stochastic growth model describing the quantum random unitary circuit evolution. By utilizing biased Monte Carlo simulations and adapting a large-deviation approach, the probabilities of ending up with a single particle at a specified final time and having particles outside the light cone at that time are evaluated. The morphological features of single-particle final configurations are discussed, revealing significant changes when events (a) and (b) occur simultaneously, indicating a second-order phase transition.
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz, R. B. Stinchcombe
Article
Physics, Fluids & Plasmas
S. L. A. de Queiroz, R. B. Stinchcombe
Article
Physics, Fluids & Plasmas
R. B. Stinchcombe, S. L. A. de Queiroz