Journal of Superconductivity and Novel Magnetism最新文献_第2页

Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06857-9

Milad Arman, Farzad Shahri, Reza Gholamipour, Sajad Sohrabi

{"title":"Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition","authors":"Milad Arman, Farzad Shahri, Reza Gholamipour, Sajad Sohrabi","doi":"10.1007/s10948-024-06857-9","DOIUrl":"10.1007/s10948-024-06857-9","url":null,"abstract":"<div>This work attempted to study the effects of the solidification behavior on the magnetic and magnetocaloric properties of stoichiometric Ni50Mn34In16 Heusler alloy. In this respect, the samples with two different diameters of 2 mm (D2 sample) and 8 mm (D8 sample) were prepared by suction casting technique. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and magnetic force microscopy (MFM) were employed to identify the structure, microstructure, and magnetic domain distribution of the samples. Also, phase transformation behavior was characterized using differential scanning calorimetry (DSC) across a temperature range of 200–350 K. Thermo-magnetic properties of samples were evaluated using SQUID Quantum Design MPMS®3 during heating and cooling at the temperature range of 175–350 K at the constant magnetic field of 2 T. Moreover, the magnetic and magnetocaloric properties of the samples were analyzed using the cryostat-equipped VSM around the magnetic phase transition temperature under a magnetic field up to 1.75 T. Based on the results obtained, it is shown that an increase in the sample diameter leads to an increase in the Curie temperature. Furthermore, it was concluded that the magnetocaloric properties such as magnetic entropy change ((Delta {S}_{text{M}})), adiabatic temperature change ((Delta {T}_{text{ad}})), and refrigerant capacity ((RC)) parameters improved with an increase in the sample diameter through the microstructural refinement and enhancing the atomic ordering. Specifically, the maximum values of the (Delta {S}_{text{M}}), (RC), and (Delta {T}_{text{ad}}) for the D8 sample are estimated to be 3.04 J/kg K, 109.83 J/kg, and 0.94 K, respectively.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Methodology for the Development of Underwater Magnetic Pulse Wireless Communication 开发水下磁脉冲无线通信的新方法

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06870-y

Satya Narayana Murthy V

引用次数: 0

Physical Impacts of Magnetic Impurities in a Diamond-decorated System by Monte Carlo Simulations

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06853-z

A. Jabar, S. Idrissi, L. Bahmad

{"title":"Physical Impacts of Magnetic Impurities in a Diamond-decorated System by Monte Carlo Simulations","authors":"A. Jabar, S. Idrissi, L. Bahmad","doi":"10.1007/s10948-024-06853-z","DOIUrl":"10.1007/s10948-024-06853-z","url":null,"abstract":"<div>This paper studies the nano-diamond structure, commonly known as the ultra-dispersed diamond (UDD) structure. This diamond-decorated system is formed with the mixed spins S = 2 and σ = 3/2. This study uses the Monte Carlo simulations (MCS) under the Metropolis algorithm. We envisaged both the first nearest-neighbor interactions and the second nearest-neighbor interactions. For simplicity, we used the reduced crystal and external magnetic field. When fixing the other physical parameters, we inspected the temperature effect on the phase diagrams of the studied system. Also, we illustrated the thermal behavior of the magnetic entropy changes of the studied system for several reduced external magnetic field values. In addition, we presented the relative cooling power (RCP) as a function of the reduced external magnetic field of the (UDD) system. The effect of the reduced crystal field on the magnetizations of the diamond-decorated system has been investigated. To complete this study, we presented and discussed the magnetic hysteresis cycle of the studied diamond-decorated system.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Structural and Magnetic Properties of Pd-Doped Co4N Thin Films

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06880-w

Akshaya A., Shailesh Kalal, K. Saravanan, Sunil Ojha, Jochen Stahn, Mukul Gupta

{"title":"Study of Structural and Magnetic Properties of Pd-Doped Co4N Thin Films","authors":"Akshaya A., Shailesh Kalal, K. Saravanan, Sunil Ojha, Jochen Stahn, Mukul Gupta","doi":"10.1007/s10948-024-06880-w","DOIUrl":"10.1007/s10948-024-06880-w","url":null,"abstract":"<div>Tetra metal nitrides (M4N; M = Cr, Fe, Co, Mn, Ni) are a promising spintronic material with an anti-perovskite structure and fascinating magnetic characteristics due to a magneto-volume effect. Though a fully stochiometric Mn4N or Fe4N has been achieved, the lattice parameter (LP) of Co4N was always been found to be significantly lower than the anticipated theoretical values, indicating a sub-stochiometric Co4N phase. The formation enthalpy of Co4N is slightly positive resulting in unfavorable thermodynamical conditions and significant out-diffusion of N from Co4N. In this work, we present a comparative study of undoped and Pd-doped Co4N thin films synthesized using a reactive nitrogen sputtering. The structural, composition, and magnetic properties have been studied by combining x-ray diffraction, Rutherford backscattering, energy-dispersive x-ray spectroscopy, secondary ion mass spectroscopy, vibrating sample magnetometer, magneto-optical Kerr effect, and polarized neutron reflectivity measurements. It was found that Pd doping of about 5 at.% results in a significant enhancement in the LP of Co4N signifying a higher amount of N retention without adversely affecting the growth and magnetic properties. It is further suggested that the amount of Pd doping may further be increased to realize a fully stoichiometric Co4N.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study of the Electromagnetic Absorption Properties of FeNi3@MnO2/FeNi3 关于 FeNi3@MnO2/FeNi3 电磁吸收特性的研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06861-z

Seyed Ebrahim Mousavi Ghahfarokhi, Fatemeh Hamalzadeh Ahmadi, Omid Khani

引用次数: 0

Eliashberg Analysis of Overdoped Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Intrinsic Tunneling Spectra

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06840-4

Xiaohong Sui, Chengwei Dong, Huanbei Ren

{"title":"Eliashberg Analysis of Overdoped Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Intrinsic Tunneling Spectra","authors":"Xiaohong Sui, Chengwei Dong, Huanbei Ren","doi":"10.1007/s10948-024-06840-4","DOIUrl":"10.1007/s10948-024-06840-4","url":null,"abstract":"<div>Considering that Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) (Bi2212) intrinsic Josephson junctions have a body-centered tetragonal structure, and we adjusted a directional tunneling matrix element in the effective density of states. Using the d-wave Eliashberg equations, tunneling spectra of overdoped Bi2212 intrinsic Josephson junction are well reproduced in a wide temperature range below the critical temperature (T_c). From which we obtained the pairing glue spectral function (alpha ^2F(Omega )), which is composed of a low-energy resonance peak and a high-energy broad spectrum. These two parts have different effects on the tunneling spectra: the low-energy resonance peak controls the entire shape of the tunneling spectra, and the high-energy broad spectrum maintains a certain electron-boson coupling constant (lambda ). Some interesting and important rules in the fitting process are summarized. The dip of tunneling spectra gradually disappears with increasing temperature, which can be fitted using a simple Dynes’ form of density of states, where the energy gap is energy-independent. As the temperature rises to (T_c), the main peak position of the density of states of the sample still remains a finite value, that is, the energy gap is not closed when the superconductivity disappears, which provides an angle to investigate the pseudogap phenomenon in high-(T_c) superconductors.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-024-06840-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Giant Magnetocaloric Effect and Magnetic Critical Behavior in Polycrystalline GdPO4 多晶 GdPO4 中的巨磁焦效应和磁临界行为

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06866-8

Jieyang Fang, Binlong Pan, Xiukun Hu, Nengjun Yu, Minxiang Pan, Hongliang Ge, Hangfu Yang, Qiong Wu

{"title":"Giant Magnetocaloric Effect and Magnetic Critical Behavior in Polycrystalline GdPO4","authors":"Jieyang Fang, Binlong Pan, Xiukun Hu, Nengjun Yu, Minxiang Pan, Hongliang Ge, Hangfu Yang, Qiong Wu","doi":"10.1007/s10948-024-06866-8","DOIUrl":"10.1007/s10948-024-06866-8","url":null,"abstract":"<div>Magnetocaloric effect (MCE) and critical behavior of polycrystalline GdPO4 prepared by chemical precipitation and solid-state sintering method were investigated. X-ray diffraction (XRD) patterns indicate that GdPO4 is crystalized in monazite phase with monoclinic crystal structure. Magnetization measurements confirm the presence of ferromagnetic-paramagnetic phase transition, as well as the presence of ferromagnetic and antiferromagnetic interactions between Gd3+ ions in the low-temperature region. Arrott curves indicate that the sample exhibits second-order magnetic phase transition behavior. The maximum value of magnetic entropy change (−∆SMmax) and relative cooling power (RCP) are 50.1 J/(kg·K) (11.3 J/(kg·K)) and 416.3 J/kg (56.4 J/kg) at 5 T (1 T) magnetic field, respectively. The maximum value of adiabatic temperature change (∆Tadmax) reaches 36.5 K under an applied magnetic field of 5 T, indicating that GdPO4 is a good candidate for low-temperature magnetic refrigeration. Critical behavior is analyzed and the existence of short-range ordering (SRO) magnetic exchange interactions in the long-range ordering (LRO) of GdPO4 is suggested to be responsible for the large magnetocaloric effect.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emergence of Magnetic Anomaly and Development of Non-linear Susceptibility with Magnetic Field in ErVO4 ErVO4 中磁场异常的出现和非线性磁感应强度的发展

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06846-y

Dheeraj Ranaut, Koushik P., K. Mukherjee

{"title":"Emergence of Magnetic Anomaly and Development of Non-linear Susceptibility with Magnetic Field in ErVO4","authors":"Dheeraj Ranaut, Koushik P., K. Mukherjee","doi":"10.1007/s10948-024-06846-y","DOIUrl":"10.1007/s10948-024-06846-y","url":null,"abstract":"<div>Novel phases in quantum materials arise when quantum fluctuations couple with frustration, geometries, and lattice dimensionalities. In continuation, frustrated magnetism combined with lattice degree of freedom, magnetoelastic coupling and magnetic anisotropy may result in exotic magnetic properties in a system. Here, we have studied a rare earth orthovanadate ErVO4, where the presence of magnetoelastic coupling along easy c-axis of magnetization results in the evolution of different magnetic phases. The second nearest neighbour Er spins in this compound form a corner-sharing tetrahedra and the spins lie along the easy c-axis, in contradiction to other members of RVO4 (R = Rare-earth) family. Our DC field superimposed AC susceptibility and heat capacity measurements show the emergence of a magnetic anomaly which is believed to originate due to the presence of large magnetoelastic coupling along the c-axis. Further, above 10 kOe, a magnetic phase associated with positive fifth order susceptibility is observed. In this region, the Zeeman energy linked with magnetic anisotropy stabilizes the interactions among the higher order moments. This observation is further supported by a theoretical model.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of the Penetration Depth and Study of the Magnetic Characteristics in Bi-Pb-Sr-Ca-Cu-O Superconductors by EPR Measurements

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06881-9

F. E. Sánchez-Zacate, S. N. Arellano-Ahumada, C. Mejía García, E. Díaz Valdés, D. Ramírez-Rosales

{"title":"Estimation of the Penetration Depth and Study of the Magnetic Characteristics in Bi-Pb-Sr-Ca-Cu-O Superconductors by EPR Measurements","authors":"F. E. Sánchez-Zacate, S. N. Arellano-Ahumada, C. Mejía García, E. Díaz Valdés, D. Ramírez-Rosales","doi":"10.1007/s10948-024-06881-9","DOIUrl":"10.1007/s10948-024-06881-9","url":null,"abstract":"<div>In this work, two polycrystalline samples were prepared using the solid-state reaction technique. The X-ray diffraction patterns revealed that the samples A and B are a mixture of the superconducting phases (Bi, Pb)-2212 (Bi1.6Pb0.4Sr2CaCu2O8) and (Bi, Pb)-2223 (Bi1.6Pb0.4Sr2Ca2Cu3O10). The (T_c) was measured using electron paramagnetic resonance (EPR) in absorption mode: 97 K for the sample A and 101 K for sample B. The EPR spectra were measured (derivative of the absorption) and showed a signal in the low-field region only present in the superconducting state. The study of this signal revealed the coexistence of antiferromagnetism and diamagnetism in the sample A, for (T < T_{c}). The same was observed in sample B after a light grinding. The effective penetration depth was estimated from the peak-to-peak linewidth of the EPR signal (at T = 92 K): (lambda )(92 K) = 479 nm for sample A, and 440 nm for sample B. These results are in agreement with the values obtained using techniques such as (mu )-spin rotation and magnetization measurements. With the aid of the two-fluid model and the BCS approximation (lambda ) was also estimated at 0 K. Using these values and the Ginzburg-Landau theory, the lower critical field was calculated at T = 92 K and 0 K.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Properties of “Quasi-Reentrant” Behavior in Granular System

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06852-0

Xiu-Zhi Duan, Guang-Xin Wang, Li-Chun Hu, Zhang Pan

{"title":"The Properties of “Quasi-Reentrant” Behavior in Granular System","authors":"Xiu-Zhi Duan, Guang-Xin Wang, Li-Chun Hu, Zhang Pan","doi":"10.1007/s10948-024-06852-0","DOIUrl":"10.1007/s10948-024-06852-0","url":null,"abstract":"<div>We have investigated the superconductor-insulator transition (SIT) induced by a disorder of a granular system. The effective energy gap model based on localized Cooper pairs and hopping quasiparticles has been used. The “quasi-reentrant” behavior appears when the metal volume fraction is slightly smaller than the percolation threshold. In particular, we have found the double “quasi-reentrant” behavior with the increased superconducting transition width. This result indicates that the double “quasi-reentrant” behavior should have been observed in a granular system with a large transition width. Besides, the “quasi-reentrant” behavior has been flattened when applying the magnetic field. In order to clarify the method is suitable for a granular system, the theoretical result has been compared with the experimental value of Pb(_x)(SiO(_2))(_{1-x}) granular film. It has almost no difference near the minimum value and the differences onset at lower temperatures due to the negative electroresistance effect. The “quasi-reentrant” behavior becomes unobvious due to the Copper pairs destroyed by the magnetic field.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0