Article
Physics, Condensed Matter
M. Persson, M. M. Kulyk, A. F. Kravets, V Korenivski
Summary: In this study, atomistic spin dynamics simulations were used to investigate the demagnetization and magnetocaloric effect (MCE) in strong-weak-strong ferromagnetic trilayers when the strong ferromagnets undergo a reorientation from parallel to antiparallel magnetization. The simulations revealed non-trivial spin distributions in the antiparallel state, allowing for direct calculation of entropy. The influence of longer-range spin-spin interactions and variable strength of the external switching field were also explored. Furthermore, it was found that the MCE in the system can be significantly improved by varying the local exchange through the spacer, which can be achieved by spatially tailoring the magnetic dilution of the spacer.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Nanoscience & Nanotechnology
Oguz Yildirim, Riccardo Tomasello, Yaoxuan Feng, Giovanni Carlotti, Silvia Tacchi, Pegah Mirzadeh Vaghefi, Anna Giordano, Tanmay Dutta, Giovanni Finocchio, Hans J. Hug, Andrada-Oana Mandru
Summary: The development of skyrmionic devices requires tuning material parameters to stabilize and control the density of skyrmions. Recent research has shown that different types of skyrmions can be simultaneously stabilized at room temperature in heterostructures containing ferromagnets, ferrimagnets, and heavy metals, offering a new platform for encoding binary information using skyrmion types instead of their presence or absence. By adjusting the geometric and material parameters of individual layers, the energy landscape of the two skyrmion types in such heterostructures can be finely tuned.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Yue Sun, Wenjun Lv, Yu Liang, Yuan Gao, Wenjun Cui, Yujie Yan, Wenyu Zhao, Qingjie Zhang, Xiahan Sang
Summary: By doping transition metal elements into La(Fe, Si)13 materials, the thermal stability and working temperature range of magnetocaloric materials can be improved. This study provides a new method for designing novel magnetocaloric materials.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
J. Cwik, Y. Koshkid'ko, M. Malecka, B. Weise, M. Krautz, A. Mikhailova, N. Kolchugina
Summary: In-depth investigations were conducted on the magnetocaloric properties of polycrystalline Tb1-xHoxNi2 intermetallic compounds, revealing differences in magnetic entropy change and adiabatic temperature change among compounds with different compositions. The impact of holmium content on the magnetic and magnetocaloric properties of Laves-phase compounds was discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Condensed Matter
Bikash Das, Subrata Ghosh, Tanima Kundu, Rahul Paramanik, Sujan Maity, Mainak Palit, Soumik Das, Pabitra Kumar Hazra, Poulomi Maji, Anudeepa Ghosh, Subhadeep Datta
Summary: This article presents the anisotropic magnetic properties of 2D van der Waals insulator chromium oxychloride (CrOCl). The temperature-dependent bulk magnetization study shows a paramagnetic to antiferromagnetic phase transition at around 14 K, while the magnetic field-dependent magnetization study reveals a field-induced metamagnetic transition from antiferromagnetic to ferrimagnetic state above 40 kOe. Notably, the switching of magnetization's easy plane to the c-axis can be observed at or above 29 kOe. Additionally, near the Neel temperature, the magnetic entropy change under applied magnetic field is estimated to be 4.31 J kg(-1) K-1 for H//c.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
J. Horcheni, K. Nouri, E. Dhahri, L. Bessais
Summary: The structural, critical behavior and magnetocaloric properties of Pr2Fe16.9Ni0.1 alloy were investigated. It was found that the sample crystallizes in the rhombohedral structure and exhibits a 3D-Ising type critical behavior. The alloy shows a direct magnetocaloric effect around room temperature with moderate magnetic entropy change and a wide working temperature range, making it comparable or even better than other intermetallic alloys.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Quanyi Liu, Junfeng Wang, Huicai Xie, Qi Fu, XinQiang Gao, Zhenxing Li, JinLiang Zhao, Zhaojun Mo
Summary: A modified solid-phase reaction method was used to synthesize polycrystalline Eu3B2O6 as a novel cryogenic magnetocaloric material. The magnetocaloric effect, magnetic properties, and crystal structure of the compound were investigated. The compound undergoes a second-order magnetic-phase transition from ferromagnetic to paramagnetic at 8 K and has a hexagonal structure belonging to the R-3c space group. The compound exhibits a high magnetic entropy change, temperature averaged entropy change, and refrigeration capacity, making it a promising candidate for cryogenic magnetic refrigeration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jiawang Xu, Xinqi Zheng, Lei Xi, Xucai Kan, Bin Bao, Tianping Ma, Yipeng Zang, Dingsong Wang, Yawei Gao, Juping Xu, Wen Yin, Baogen Shen, Shouguo Wang
Summary: Research on magnetic refrigeration has shifted its focus to lower operating temperatures, which is crucial for the use of liquid helium and hydrogen in aerospace and advanced industries. This study demonstrates significant improvement in magnetocaloric effects and magnetic materials operating in the desired temperature range. The findings have promising applications in helium-hydrogen liquefaction.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Multidisciplinary
C. A. Taboada-Moreno, A. M. Bolarin-Miro, F. Pedro-Garcia, C. A. Cortes-Escobedo, F. Sanchez-De Jesus
Summary: This study discusses the role of magnetic ion Gd3+ in the crystal structure, magnetic, and magnetocaloric properties of doped lanthanum-strontium manganite. The X-ray diffraction patterns confirm different crystal structures for different gadolinium contents. The Curie temperature decreases with increasing Gd3+ content, attributed to a weakening in the double exchange interaction. The maximum magnetocaloric effect is observed in the paramagnetic to ferromagnetic ordering range, making the doped lanthanum manganite a suitable material for refrigeration applications at room temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Condensed Matter
Priyanka Bisht, Meenakshi, Arpit Gaur, Rabindra Nath Mahato
Summary: The (0.75)La0.7Ca0.3MnO3/(0.25)La0.84Sr0.16MnO3 nanocomposite material exhibited excellent magnetic and magneto-caloric properties, with a higher relative cooling capacity compared to the parent samples. The experimental results showed two successive transitions in the composite sample corresponding to the parent samples La0.7Ca0.3MnO3 and La0.84Sr0.16MnO3.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
Kagan Sarlar, Atakan Tekgul, Nil Kucuk, Akin B. Etemoglu
Summary: In this study, a new Fe30.7Ni25.7Ga14.6Mn19Si10 high entropy alloy without rare earth element was investigated for its magnetocaloric properties. The alloy displayed a single body centred cubic structure with second order magnetic phase transition at transition temperatures of 442 K and 462 K for the as-quenched and annealed alloy. The magnetic entropy change was observed to be 0.75 Jkg(-1) K-1 and 0.90 Jkg(-1) K-1 for the as-quenched and annealed alloy at 2 T magnetic field.
Article
Materials Science, Multidisciplinary
Semiramis Gulkesen, Kutluhan Utku Tumen, Mustafa Akyol, Ahmet Ekicibil
Summary: In this study, a series of Co(Cr1-xFex)(2)O-4 compounds were synthesized by sol-gel method, and it was found that magnetic and magnetocaloric properties were significantly altered when Fe ions partially replaced Cr ions in CoCr2O4. After 50% Fe substitution, the material exhibited higher magnetic transition temperature and magnetic entropy change values, making it a potential candidate for magnetic refrigerant applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Physics, Applied
Jiayu Zhang, Yong Hu
Summary: The role of magnetocrystalline anisotropy in single crystals on the anisotropic magnetocaloric effect was studied using Monte Carlo simulation. The study found that anisotropy can affect the spin reorientation transition temperature and the magnetization behavior at low temperatures and weak fields. Additionally, the anisotropy of entropy change is most significant when the magnetic field is parallel to the easy axis.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
E. Palacios, R. Saez-Puche, J. Romero, Y. Doi, Y. Hinatsu, M. Evangelisti
Summary: EuGd2O4 and EuDy2O4 exhibit a remarkably large magnetocaloric effect at cryogenic temperatures due to their high magnetic density and low ordering temperatures. The antiferromagnetic ordering of Gd derivative at T-N = 4.6 K exceeds that of the reference refrigerant GGG above 5 K. EuDy2O4 has a lower magnetocaloric effect than EuGd2O4, yet larger than GGG.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yu-Cai Wu, Yuan-Xin Li, Xi -Chun Zhong, Cui-Lan Liu, Jiao-Hong Huang, Hong-Ya Yu, Zhong-Wu Liu, Ming -Long Zhong, Zhen-Chen Zhong, Raju V. Ramanujan
Summary: LaFeSi bulk magnetocaloric materials were prepared using hot-pressing sintering and spark plasma sintering techniques. The reduction of porosity was found to enhance the magnetocaloric effect.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Physical
Eddy Dib, Edwin B. Clatworthy, Arnold A. Paecklar, Julien Grand, Nicolas Barrier, Svetlana Mintova
Summary: Using solid-state 29Si nuclear magnetic resonance (NMR), this study demonstrates that the distribution of aluminum within the framework of Na,Cs-RHO type zeolites plays a crucial role in determining CO2 adsorption capacity and structural flexibility. The flexibility of the zeolite framework is not solely dependent on the type of cation loading, but also on the distribution of Si species and pore aperture shape.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Wangyou Chu, Chunting Yu, Zengjun Xiao, Qiang Zhang, Yang Chen, Dongfeng Zhao
Summary: The electronic transition spectra of the indene molecular cation (In+,C9H8+) in the 550-580 nm region were measured using direct absorption in the gas phase. The study found two vibronic bands and obtained several spectroscopic parameters through band contour analysis and ab-initio calculations. The experiment data was compared to diffuse interstellar bands (DIBs) and upper limits for In+ column densities in the diffuse interstellar medium were estimated.
Article
Chemistry, Physical
Fang Guo, Wuyi Cao, Lilli Wang, Qiang Zhang, Junqiang Xu
Summary: The radio frequency plasma was used for either decorating the MCM-41 support or treating the catalyst precursor. The comparison of nickel-based catalysts prepared by different plasma treated modes showed that plasma treated catalyst supported on plasma decorated MCM-41 exhibited the highest activity and best stability. This was attributed to the fewer Si-OH groups on the support, smaller nickel particle size, more homogeneous dispersion, and stronger interaction between nickel and MCM-41.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shangchun Teng, Huayue Chen, Qiang Zhang, Desheng Han
Summary: Time-domain structures (TDS) are important for accelerating electrons in the field-aligned direction and contribute to the formation of aurora. This study shows a close correlation between TDS and plasmaspheric plumes, suggesting that plasma density may modulate the generation of TDS. The correlation between TDS and scattered particles emphasizes the importance of including time-domain structures in future studies of radiation belt dynamics.
Article
Chemistry, Multidisciplinary
Jing Xu, Qiang Zhang, Xin Gao, Peifang Wang, Huinan Che, Chunmei Tang, Yanhui Ao
Summary: By using Fe-III/BiOIO3 piezo-catalyst, this study develops a highly efficient PSF system that combines two-electron water oxidative H2O2 production with Fe-III reduction. Fe-III can initiate both the water oxidative reaction and the reduction to Fe-II, thereby enabling a rapid Fenton reaction of H2O2/Fe-II. The Fe-III initiating PSF system shows exceptional self-recyclable degradation of pollutants.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Qiang Zhang, Wei Tian, Roshan Nepal, Ashfia Huq, Stephen Nagler, J. F. DiTusa, Rongying Jin
Summary: In this study, the relationship between the structure and magnetic transitions in FeMn2O4 is investigated by high-resolution neutron powder diffraction. It is found that FeMn2O4 undergoes a structural transition from a cubic phase to a tetragonal phase at around 750K, driven by the Jahn-Teller effect of the B-site Mn3+ ions. Another magnetic transition and structural distortion occur at around 400K, accompanied by changes in lattice constants. At 65K, a noncollinear ferrimagnetic order is observed with different moments at the B1 and B2 magnetic sites. The A-site and B-site magnetic cations play distinct roles in the structural and magnetic properties of FeMn2O4. This study demonstrates that FeMn2O4 is an excellent platform to study interesting magnetic orders and their correlations with polyhedral distortions and lattice.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Yili Cao, Takeshi Matsukawa, Alexandra Gibbs, Maxim Avdeev, Chin-Wei Wang, Hui Wu, Qing-zhen Huang, Kenji Ohoyama, Toru Ishigaki, Haowei Zhou, Qiang Li, Jun Miao, Kun Lin, Xianran Xing
Summary: To achieve zero thermal expansion (ZTE), negative thermal expansion is typically used through chemical substitutions, but it often requires trial and error. In this study, we explored the quantification of thermal expansion using magnetic ordering in a specific intermetallic compound, which accurately determined the ZTE composition using existing databases. This research provides insight into high throughput searches for ZTE materials and has potential applications.
CHEMISTRY OF MATERIALS
(2023)
Article
Physics, Atomic, Molecular & Chemical
Chunting Yu, Zengjun Xiao, Wangyou Chu, Qiang Zhang, Yang Chen, Dongfeng Zhao
Summary: The rotationally resolved spectrum of the A(2)A'' X(2)A'' 0(0)(0) band of jet-cooled 1-indanyl near 473 nm is recorded with laser induced fluorescence. Accurate spectroscopic constants for both A(2)A'' and X(2)A'' states of 1-indanyl are determined through rotational analysis. The computational results show good agreements with the experimental data, supporting the delocalization of unpaired p(pi) electron in stabilizing the 1-indanyl radical.
CHINESE JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
EliseAnne C. C. Koskelo, Nicola D. D. Kelly, Liam A. V. Nagle-Cocco, Joshua D. D. Bocarsly, Paromita Mukherjee, Cheng Liu, Qiang Zhang, Sian E. Dutton
Summary: By adjusting different parameters of fcc lanthanide oxides, such as chemical pressure via the A site cation and the magnetic ground state via the lanthanide ion, the magnetocaloric effect can be maximized for magnetic refrigeration design. This study also introduces the Ca(2)LnSbO(6) series with tunable site disorder that can control the deviations from Curie-Weiss behavior.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Applied
Mouli Roy-Chowdhury, Suchit Kumar Jena, Vedant Pramod Khadse, Deep Chandra Joshi, Subhash Thota
Summary: This study presents a comprehensive investigation on the structural, magnetic and dielectric properties of ferrite cuprospinels with site specific substitution of non-magnetic Zn and weakly magnetic Ru ions. The study reveals that such substitution leads to stable crystal symmetries, significant Jahn-Teller distortion, ferrimagnetic behavior, and antiferromagnetic ordering. The investigated systems also exhibit significant magneto-crystalline anisotropy and enhancement of mid-frequency dielectric constant with low-loss.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Qiang Zhang, Qihang Bu, Jiangyue Xia, Rongxue Sun, Dajing Li, Haibo Luo, Ning Jiang, Cheng Wang
Summary: The purpose of this study was to develop a bio-based nanocomposite coating with good functional activity and self-healing ability for applications in food, materials, and other fields. Plastic coatings cause environmental pollution, so replacing them with degradable coatings is a good solution. However, the development of degradable coatings in the food and materials fields is restricted by their insufficient antibacterial ability and weak comprehensive properties. Therefore, chitosan nanoparticles loaded with gallic acid were self-assembled with gelatin to prepare high-performance, degradable, self-healing bio-based nanocomposite coatings with antibacterial and antioxidant properties.
Article
Nanoscience & Nanotechnology
Tianyu Li, Sz-Chian Liou, Stephanie J. Hong, Qiang Zhang, H. Cein Mandujano, Efrain E. Rodriguez
Summary: By using neutron, electron, and synchrotron X-ray diffraction studies, we have observed a structural modulation in the mixed valence multiferroic LnFeMnO(4.5). Bond valence analysis suggests that oxygen insertion likely occurs at the middle of the Fe/Mn-O bipyramid layers. The nature of the lanthanide, Ln(3+), does not seem to influence such modulations.
Article
Crystallography
Michael A. A. McGuire, Eleanor M. M. Clements, Qiang Zhang, Satoshi Okamoto
Summary: This article investigates the properties of Pt3X2 (X = In and Tl), which adopt a double-layer kagome net structure related to topologically nontrivial compounds Fe3Sn2 and V3Sb2. Through various measurements and calculations, it is found that the Fermi levels of Pt3X2 lie in pseudogaps, and several bands contribute to transport. Despite the extended nature of the Pt 5d states, the observed moderately large and non-saturating magnetoresistance values and quantum oscillations suggest the presence of the kagome nets in Pt.
Article
Multidisciplinary Sciences
Meng Xu, Qiang Li, Yuzhu Song, Yuanji Xu, Andrea Sanson, Naike Shi, Na Wang, Qiang Sun, Changtian Wang, Xin Chen, Yongqiang Qiao, Feixiang Long, Hui Liu, Qiang Zhang, Alessandro Venier, Yang Ren, Francesco d'Acapito, Luca Olivi, Danilo Oliveira De Souza, Xianran Xing, Jun Chen
Summary: In this study, a metallic framework-like material FeZr2 is found to exhibit a giant uniaxial (1D) negative thermal expansion (NTE) with a wide temperature range. The origin of the giant NTE is attributed to the coupling with phonons, flexible framework-like structure, and soft bonds. This finding is significant in understanding the nature of thermal expansion and guiding the regulation of thermal expansion.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
