Article
Chemistry, Multidisciplinary
Chenhui Yan, Yanglin Zhu, Leixin Miao, Sebastian Fernandez-Mulligan, Emanuel Green, Ruobing Mei, Hengxin Tan, Binghai Yan, Chao-Xing Liu, Nasim Alem, Zhiqiang Mao, Shuolong Yang
Summary: Researchers have discovered tunable magnetic ground states in MnBi6Te10 by using magnetization measurements, angle-resolved photoemission spectroscopy, and transmission electron microscopy. They have demonstrated an energy gap at the Dirac point on the MnBi2Te4 termination in the ferromagnetic phase, and gapless topological surface states on all terminations in the antiferromagnetic MnBi6Te10. By analyzing the data, they have proposed a conceptual framework to explain how these defects can affect the overall magnetic ground state energy and be used to tune the magnetic topological orders.
Article
Materials Science, Multidisciplinary
Kota Mitsumoto, Hikaru Kawamura
Summary: The ordering properties of the isotropic RKKY Heisenberg model on the 2D triangular lattice and its implications for the formation of chiral-degenerate skyrmion crystal (SkX) in metallic magnets are studied by extensive Monte Carlo simulations.
Article
Materials Science, Multidisciplinary
Jeonghun Lee, Eundeok Mun
Summary: Single crystals of RNi4Cd (R = Ce, Nd, Sm, and Gd - Tm) are grown by Cd flux and their physical properties are investigated. The unit cell volume of RNi4Cd follows a lanthanide contraction, implying a 3+ valence state of rare-earth ions in this series, except for R = Ce. Magnetic susceptibility curves for R = Nd and Gd-Tm follow the Curie-Weiss behavior at high temperatures. The electrical resistivity shows metallic behavior for all RNi4Cd compounds. Only GdNi4Cd indicates an antiferromagnetic ordering below TN = 4.5 K.
Article
Physics, Condensed Matter
Manjula Nerella, Madireddy Buchi Suresh, Sobha Bathulapalli
Summary: The study investigates the impact of cobalt doping on the optical, dielectric, and magnetic properties of SnSe. It was found that the morphology and bandgaps of the material were affected by the doping level, with potential applications in spintronic devices.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Physics, Applied
Chaowei Hu, Makariy A. Tanatar, Ruslan Prozorov, Ni Ni
Summary: MBT is the first intrinsic magnetic topological insulator and can be made ferromagnetic through specific methods. We studied the magnetic dynamics of several ferromagnetic MBT compounds and found a universal slow relaxation behavior, attributing it to irreversible domain movements. The soft nature of ferromagnetic domains was revealed by our magneto-optical measurements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Satoru Hayami, Tsuyoshi Okubo, Yukitoshi Motome
Summary: The study explores how phase shifts in skyrmion crystals can lead to other crystalline topological spin textures, showing nonreciprocal transport phenomena and providing more diversity for topological spin textures.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Khushboo Punia, Ganesh Lal, Saurabh Dalela, Satya Narain Dolia, Parvez Ahmad Alvi, Shiv K. Barbar, Kunal B. Modi, Sudhish Kumar
Summary: The study reveals the impact of Gd substitution on the structural, optical, photoluminescence, and magnetic properties of Zn1-xGdxO nanocrystals, including crystallinity, band gap energy, emission characteristics, and magnetization behavior. Gd substitution results in a reduction in the average crystallite size of Zn1-xGdxO nanocrystals and confirms the coexistence of paramagnetic and weak ferromagnetic ordering in the presence of Gd.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Haiyan Zhu, Yifan Gao, Yusheng Hou, Zhigang Gui, Li Huang
Summary: In this study, the magnetic diagram of monolayer 1T-CrTe2 under in-plane biaxial strain and on-site Coulomb repulsion is obtained using first-principles calculations. It is found that the magnetic order of monolayer 1T-CrTe2 can change from ferromagnetic to antiferromagnetic with strain and electronic correlation. Furthermore, the large exchange anisotropy and higher-order biquadratic interactions are crucial for accurately describing the spin energies in monolayer 1T-CrTe2, while the dependence of magnetocrystalline anisotropy on strain and Coulomb repulsion is explained.
Article
Materials Science, Multidisciplinary
Ganesh Lal, Jyoti Joshi, Himani Bhoi, Khushboo Punia, Satya Narain Dolia, Banwari L. Choudhary, Shiv K. Barbar, Sudhish Kumar
Summary: Hydrogenation significantly affects the structural, dielectric, and magnetic properties of La0.5Ca0.5MnO3, leading to changes in dielectric constant and magnetic behavior. The study demonstrates a transition from paramagnetic to antiferromagnetic phase in hydrogenated La0.5Ca0.5MnO3.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Physics, Fluids & Plasmas
Bruno Murta, J. Fernandez-Rossier
Summary: This article introduces Quintanilla's theorem, which establishes a one-to-one relation between zero-temperature static spin-spin correlators and coupling constants for quantum spin Hamiltonians. The theorem provides a theoretical foundation for learning quantum spin Hamiltonians using spin structure factors as input data. The validity of the theorem is extended to the case of finite-temperature spin structure factors, and it also applies to all types of Hamiltonians expressed as sums of bilinear operators.
Article
Nanoscience & Nanotechnology
Shiu-Ming Huang, Pin-Cing Wang, Hao-Lun Jian, Mitch M. C. Chou
Summary: The magnetic susceptibility exhibits specific characteristics at different temperatures and magnetic fields. Below the Neel temperature, a hysteresis loop is observed in the magnetic susceptibility. The splitting of magnetic susceptibility is more significant at lower temperatures and external magnetic fields.
NANOSCALE RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
Yow-Jon Lin, Hsing-Cheng Chang, C. Y. Chuang, Ping-En Lu, Jing-Shiuan Huang
Summary: This study investigates the effect of graphene addition on the electrical and ferromagnetic properties of ZnO thin films. The results show that graphene doping increases the hole concentration in the thin film and enhances the intensity of the ferromagnetic signal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Crystallography
Sueli H. Masunaga, Vagner B. Barbeta, Fabio Abud, Milton S. Torikachvili, Renato F. Jardim
Summary: Rare-earth tetraborides RB4 with geometric magnetic frustration and unusual magnetic properties are attracting great interest. In GdB4, the Gd3+ spins align along the ab plane, while in the isomorphic ErB4, the Er3+ spins are confined to the c-axis. Solid solutions of (Gd, Er)B-4 provide a good platform to explore the intricate magnetic behavior in these compounds. Single crystals of Gd1-xErxB4 (x = 0, 0.2, and 0.4) were grown in aluminum flux, showing single-phase materials and a drop in unit cell volume with increasing Er content. Heat capacity measurements revealed a systematic decrease of the Neel temperature (T-N) with increasing Er content.
Article
Materials Science, Multidisciplinary
Xiuxian Yang, Ping Yang, Xiaodong Zhou, Wanxiang Feng, Yugui Yao
Summary: In this study, we systematically investigate the electronic structure, magnetocrystalline anisotropy energy, magneto-optical effects, and anomalous transport properties of two-dimensional CrXY magnets. Our results show that these materials exhibit superior magneto-optical responses and anomalous transport properties, making them promising candidates for magneto-optical devices, spintronics, and spin caloritronics applications.
Article
Materials Science, Multidisciplinary
Yechen Xun, Ziye Zhu, Xiaofang Chen, Jingshan Qi
Summary: A one-dimensional ferromagnetic semiconductor CrSbSe3 with high Curie temperature and sizable magnetic anisotropy is proposed in this work, based on first-principle calculations and theoretical model. The study predicts the potential exfoliation of a 1D CrSbSe3 ladder, with a high T-C of up to 170 K, attributed to strong intraladder ferromagnetic exchange interaction and large magnetic anisotropy.
Article
Chemistry, Physical
Nazan Demiryurek, Burak Kivrak, Mustafa Akyol, Ahmet Ekicibil
Summary: The study investigated the effects of boron doping into MnO delta on the structural and magnetic properties. Doping of B led to a change in crystal structure from MnO to Mn3O4, as well as the observation of a new crystal orientation B2Mn3O6. The synthesized nanoparticles showed varying particle sizes and increased saturation magnetization with boron content.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Electrical & Electronic
Derya Farisogullari, Michal Babij, Faruk Karadag, Ahmet Ekicibil, Yoshihiko Takano
Summary: In this study, the effect of silver addition to FeSe0.94 superconducting wire was investigated. It was found that silver addition influenced the structural composition and performance of the wire. The presence of silver in the wire supported intergrain connections and promoted a larger critical current density, with the upper critical field estimated to be 66.3 T.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Dogan Kaya, Idris Adanur, Mustafa Akyol, Faruk Karadag, Ahmet Ekicibil
Summary: CoPt nanoparticles were synthesized by the reduction of Pt(acac)2 and Co(acac)2 simultaneously under N-2 atmosphere with the polyol method. The structural and magnetic properties of CoPt nanoparticles are affected by the increased Pt concentration and size effects. The magnetic results showed that coercivity and exchange bias decreased with increasing temperature and Pt concentration as the nanoparticles transitioned from ferromagnetic to superparamagnetic phase.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Electrical & Electronic
S. K. Cetin, K. Snini, M. Ellouze, A. Ekicibil, E. K. Hlil
Summary: In this study, Pr0.67Ba0.22Sr0.11Mn1-xNixO3 manganite oxides were prepared by solid-state reaction, and their structural, electrical, and magnetic properties were investigated using XRD, impedance spectroscopy, and magnetization measurements. The results show that with increasing Ni content, the transition temperature from ferromagnetic to paramagnetic phase increases, leading to higher magnetic entropy change values.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Selda Kilic Cetin, Gonul Akca, Mehmet Selim Aslan, Ahmet Ekicibil
Summary: The study demonstrates the effect of Ni substitution for Mn on the structural, magnetic, and magnetocaloric properties of La0.7Sr0.3MnO3 manganite. The decrease in T-C with Ni addition and the variation in Delta S-M values are observed in the study. Additionally, the Arrott plots and scaling analysis of Delta S-M show second-order magnetic transitions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
E. Hannachi, Y. Slimani, Ahmed T. Okasha, Ghulam Yasin, Munawar Iqbal, M. Shariq, Dogan Kaya, F. Ben Azzouz, Ahmet Ekicibil
Summary: The article discusses the impact of adding one-dimensional titanium dioxide nanowires on the magnetization and electrical properties of YBCO bulk system. The nanowires were found to enhance flux pinning properties and affect the electrical and pseudo-gap analysis of the samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Kutluhan Utku Tumen, Burak Kivrak, Fatih Ozkan Alkurt, Mustafa Akyol, Muharrem Karaaslan, Ahmet Ekicibil
Summary: This study investigated the structural and magnetic properties of NixCo1-xFe2O4 and ZnO nanoparticles synthesized by the sol-gel method. It was found that the lattice parameters decrease with increased Ni content in NixCo1-xFe2O4, leading to a decrease in magnetic saturation and remanence magnetization. The composites showed efficient microwave absorption properties in the X-band, indicating potential applications in aviation, radar, and defense vehicles.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Physics, Applied
A. Tokkaya, S. Kilic Cetin, B. Altan, A. Coskun, E. Tasarkuyu, A. Ekicibil
Summary: By adjusting the sintering time, the morphology, structure, and magnetic properties of La0.80Ag0.20MnO3 manganite perovskite can be affected. Different sintering times mainly impact grain size, grain distribution, microstructure, and crystallinity, with no significant changes observed in the magnetic phase transition temperature and magnetocaloric properties.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Chemistry, Analytical
Muharrem Kunduraci, Selda Kilic Cetin, Ugur Caglayan, Rasiha Nefise Mutlu, Dogan Kaya, Ahmet Ekicibil
Summary: The electrochemical performance of an aqueous lithium-ion battery with LiV3O8 anode, 'water-in-salt' 20 M LiTFSI electrolyte, and LiNi1/3Co1/3Mn1/3O2 cathode was investigated. The battery exhibited high lithiation capacity, extended cycle life, and stable discharge potential.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Ali Osman Ayas, Arda Kandemir, Selda Kilic Cetin, Gonul Akca, Mustafa Akyol, Ahmet Ekicibil
Summary: The study investigated the effect of sintering temperature change on the structural, magnetic, and magnetocaloric properties of PrCaMn2O6 compound. Results showed that with increasing sintering temperature, the grain size of samples increased and impurity phases decreased. Magnetic measurements indicated that all samples exhibited a second order magnetic phase transition.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Arictan Tulga Coskun, Selda Kilic Cetin, Ahmet Ekicibil
Summary: This study investigated the effect of potassium doping on the morphological, crystallographic, magnetic, and magnetocaloric properties of La1.4Ca1.6Mn2O7 double perovskite. The results showed that the addition of potassium ions led to a decrease in T-C values and magnetic entropy change. The experimental results indicate that these samples could be potential candidates for sub-room temperature magnetic cooling applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Burak Kivrak, Mustafa Akyol, Ahmet Ekicibil
Summary: This study investigates the structural and magnetic properties of pure and M-doped (M: Fe and Cu) MoS2 thin films. It is found that the introduction of Fe atoms into the main structure enhances the magnetization values and gives rise to ferromagnetic characteristics. On the other hand, Cu-doped samples exhibit strong diamagnetic characteristics. The results suggest that doping can significantly influence the magnetic properties of MoS2.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Thermodynamics
Selda Kilic Cetin, Gonul Akca, Mehmet Selim Aslan, Ahmet Ekicibil
Summary: In this study, composite materials were formed by overlapping the magnetic entropy peaks of LCSM and LSMN manganite to achieve larger RCP values near room temperature for magnetic cooling systems. The composite compounds showed magnetocaloric properties at temperatures close to room temperature, and larger RCP values were obtained by bringing the two entropy peaks closer to each other, which is of great technological importance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Selda Kilic Cetin, Gonul Akca, Dogan Kaya, Ali Osman Ayas, Ahmet Ekicibil
Summary: This study investigates the effect of Ru additive on the crystallographic, magnetic, and electro-catalytic properties of LaBiBaMnO3 manganite for magnetic refrigeration and energy storage systems. The results show that the substitution of Mn with 10% Ru leads to a decrease in Curie temperature, magnetic entropy value, and onset potential for oxygen evolution and reduction reactions. It also increases the electrode activity and current density for oxygen evolution reaction, and improves the ORR efficiency and charge transfer for ORR activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Electrical & Electronic
Gonul Akca, Arda Kandemir, Ali Osman Ayas, Selda Kilic Cetin, Mustafa Akyol, Ahmet Ekicibil
Summary: In this study, PrGd1-xBaxMn2O6 (x = 0.0, 0.6, 0.7, 0.8, 0.9, 1.0) double-perovskite manganite samples were prepared using the solid-state reaction method and their structure and magnetic properties were investigated. The results showed that the Curie temperature and magnetic entropy change values increased with increasing Ba concentration, and all samples exhibited a second-order magnetic phase transition.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
