Article
Materials Science, Multidisciplinary
A. V. Shadrin, Yu. D. Panov
Summary: This study investigates the effects of magnetic field on frustrated phase states, focusing on the magnetic entropy change and the isentropic dependence of temperature. The results show that frustrated phases exhibit nonequivalent behavior in the antiferromagnetic and ferromagnetic cases. Furthermore, the presence of impurities significantly alters the magnetic Gruneisen parameter.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
A. Singha, P. Willke, T. Bilgeri, X. Zhang, H. Brune, F. Donati, A. J. Heinrich, T. Choi
Summary: Atomic scale engineering of magnetic fields is crucial for miniaturizing quantum devices and precise control of quantum systems. Surface-supported single atom magnets with a giant magnetic anisotropy energy exhibit long-term stability of spin states at low temperatures. Dy adsorbed onto MgO shows a high MAE and a life time of several days at low temperatures, making it a promising candidate for magnetic nanostructures.
NATURE COMMUNICATIONS
(2021)
Article
Polymer Science
Min Yang, Feng Wang, Wei Wang, Bo-chen Li, Jia-qi Lv
Summary: The impact of exchange coupling, crystal field, and external magnetic field on the magnetic, thermodynamic behaviors, and magnetocaloric effect of a ferromagnetic mixed-spin (1, 1/2) Ising polyhedral chain has been explored using Monte Carlo simulation. The study found that increasing the exchange coupling and external magnetic field has a positive impact on the magnetic properties, while a strong crystal field is not conducive to stabilizing the system. Furthermore, different parameters have different effects on the magnetocaloric effect of the system.
Article
Materials Science, Multidisciplinary
Jozef Strecka, Katarina Karl'ova, Azadeh Ghannadan
Summary: The study of a spin-1/2 Ising-Heisenberg branched chain, consisting of Ising spins and Heisenberg dimers in a magnetic field, reveals that the interaction anisotropy significantly influences the breakdown of the intermediate magnetization plateau, representing a macroscopic manifestation of the quantum ferrimagnetic phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Zhen Shao, Wen-Jing Jiang, Liang Zhao, Dan Liu, Yin-Shan Meng, Tao Liu
Summary: A cyanide-bridged FeIII zigzag chain with both metal-to-metal charge transfer and single-chain magnet behavior was synthesized. The transition from diamagnetic to paramagnetic state induced by 808 nm light strengthened magnetic anisotropy and opened up intrachain magnetic interactions, resulting in enhanced single-chain magnet behavior.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Lu Zhang, Jin Xiong, Yin-Shan Meng, Tao Liu
Summary: Five mononuclear compounds were synthesized by combining cyclopentadiene, β-diketonate, tripyrazoylborate ligands, and dysprosium ion. Magnetic studies revealed that compounds 1Dy and 3Dy exhibited typical butterfly-type hysteresis, while compounds 1Dy-4Dy showed magnetic relaxation governed by the Orbach and Raman processes. Compound 3Dy showed a two-step magnetic relaxation attributed to the static disordering of the coordinated THF molecule. Magnetic anisotropy analysis indicated that the strength of interactions between Dy III and surrounding ligands determined the orientation of the magnetic easy axis.
CHINESE CHEMICAL LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Lucia Galisova, Jozef Strecka, Taras Verkholyak, Samuel Havadej
Summary: The spin-1/2 orthogonal-dimer chain composed of regularly alternating Ising and Heisenberg dimers was solved exactly in the presence of a magnetic field using the transfer-matrix method. The ground-state phase diagram was found to consist of six different phases, each with unique characteristics such as magnetization plateaus and bipartite entanglement, which may exhibit unexpected behaviors under certain parameter regions.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Physics, Multidisciplinary
Yi-Dan Zheng, Bin Zhou
Summary: This study investigates the thermal entanglement in a mixed spin Ising-Heisenberg branched chain system using negativity as an entanglement measurement. The relationship between negativity and quantum phase transition is established, and it is found that the usability of negativity in detecting the quantum phase transition point depends on the thermal energy. The study also reveals the temperature range in which negativity can be used to signal each ground-state transition. Additionally, the thermal stability of negativity is closely related to the energy gap in the system, and negativity exhibits distinct behaviors between quantum and classical phases.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
A. M. Belemuk, S. M. Stishov
Summary: In this study, the effect of impurity doping on the magnetic susceptibility and magnetic moment development in chiral magnets is investigated using the spin-lattice model. Silicide-Fe- and Co-doped MnSi, a particular class of chiral magnets, is focused on. Two feasible models for different impurity arrangements in real compounds are introduced. Monte Carlo method is employed for classical spins calculation. The magnetic response and degradation of the magnetic phase transition upon doping are of interest. Calculated susceptibility is compared with available experimental data in these compounds. The behavior of the magnetic susceptibility is illustrated by corresponding spin patterns, showing the deterioration of the spiral structure with temperature and the formation of ring-shape patterns in Bragg intensity profiles.
Article
Engineering, Electrical & Electronic
Yasuhiro Fuwa, Yoshihisa Iwashita, Akihiro Kondo
Summary: This study proposes the application of permanent magnet technology to cryogenic hybrid magnets, aiming to reduce the requirement for superconducting magnets by generating additional magnetic fields using permanent magnets. The experimental results show that Praseodymium (Pr) based magnets have higher coercivity and remanent magnetic flux density compared to neodymium (Nd) based magnets, making them suitable as field boosters in high-field hybrid magnets.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Multidisciplinary
Olivier Gauthe, Frederic Mila
Summary: Using an SU(2) invariant finite-temperature tensor network algorithm, strong numerical evidence supports an Ising transition in the collinear phase of the spin-1/2 J(1)-J(2) Heisenberg model on the square lattice. The critical temperature reaches a maximal value at specific J(2)/J(1) ratios, and is suppressed as the system approaches the zero-temperature boundary of the collinear phase. Enforcing SU(2) symmetry is crucial in avoiding finite-temperature symmetry breaking and opens new perspectives in studying the thermal properties of quantum Heisenberg antiferromagnets.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Yuan Chen, Yun Liao, Wenan Li
Summary: The spin wave theory is applied to the one-dimensional Heisenberg antiferromagnet in the presence of two different anisotropies, resulting in the discovery of antiferromagnetic-disorder phase transition induced by the interplay between the two anisotropies in the small anisotropy region at zero-temperature.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Materials Science, Multidisciplinary
Shashank Kumar Ranu, Daniel D. Stancil
Summary: This study proposes a method for calculating excited states of spin chains and demonstrates its application on small spin chains. The method involves finding the equilibrium points of the energy vs wave-number curve and is validated using numerical techniques and an IBM quantum processor. Furthermore, the study discusses the circuit complexity and scalability of the proposed method.
Article
Materials Science, Multidisciplinary
Subhash Thota, Sayandeep Ghosh, R. Maruthi, Deep C. Joshi, Rohit Medwal, Rajdeep S. Rawat, Mohindar S. Seehra
Summary: Measurements and analysis of the magnetization versus temperature in a polycrystalline sample of Ising chain ferromagnet CoNb2O6 reveal a ground state with effective spin S = 1/2, contrary to the expected S = 3/2 from Hund's rules. The fit of the data indicates the presence of noncubic crystalline field and spin-orbit coupling effects.
Review
Chemistry, Multidisciplinary
Chen Wang, Yin-Shan Meng, Shang-Da Jiang, Bing-Wu Wang, Song Gao
Summary: Single-molecule magnets (SMMs) with slow magnetization relaxation and purely molecular hysteresis are promising for information storage, spintronics, and quantum computing. Improving the blocking temperature (T-B) and effective relaxation barrier (U-eff) is crucial for their application. Multidisciplinary research has achieved SMMs with a U-eff up to 2,000 K and a T-B in the liquid nitrogen region. Enhancing the uniaxiality of magnetic anisotropy is critical for high-performance SMMs.
SCIENCE CHINA-CHEMISTRY
(2023)