Article
Physics, Applied
Shantanu Kumar Panda, Subhadeep Datta, Shampa Guha, Jyotirekha Mallick, Manoranjan Kar
Summary: The study investigates the coupled magnetostructural transition and associated magnetocaloric effect in the (Mn0.6Fe0.4)(Ni1-xCox)Si system. By introducing Co at the Ni site, a significant isothermal magnetic entropy change and relative cooling power are achieved. The efficiency of the material is influenced by the complex hysteresis behavior around the phase transition under different temperature- and field-sweep rates.
PHYSICAL REVIEW APPLIED
(2021)
Article
Materials Science, Multidisciplinary
Bin Zhang, Yuping Duan, Haifeng Zhang, Shuo Huang, Guojia Ma, Tongmin Wang, Xinglong Dong, Nan Jia
Summary: In this study, synergistic effects among different induction elements were found to affect the magnetic properties of high entropy alloys. Specific combinations of induction elements led to changes in saturation magnetization, with larger increments observed when multiple induction elements coexisted.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jiajing Yang, Zongbin Li, Xiaoliang Zhang, Bo Yang, Haile Yan, Daoyong Cong, Xiang Zhao, Liang Zuo
Summary: In this research, the strategy of lattice contraction was used to manipulate the thermal hysteresis and magnetocaloric response in Ni-Co-Mn-In magnetocaloric alloys. By replacing In with Ge, the thermal hysteresis was significantly reduced, leading to a large effective refrigeration capacity and reversible entropy change. The substitution of Ge effectively decreased the lattice misfit, thus decreasing the elastic energy accompanying the structural transformation and the related hysteresis.
Article
Nanoscience & Nanotechnology
Saurabh Singh, Na Liu, Yu Zhang, Amin Nozariasbmarz, Sumanta Kumar Karan, Lavanya Raman, Gagan K. Goyal, Shweta Sharma, Wenjie Li, Shashank Priya, Bed Poudel
Summary: This study demonstrates a high-performance Gd5Si2.4Ge1.6 thermomagnetic alloy that meets the requirements of magnetic phase transition, magnetization change, and thermal conductivity. By introducing Ge doping in Gd5Si4, the magnetic phase transition temperature was successfully shifted to 306 K, and a sharper and more symmetric magnetization behavior with a saturation magnetization of M (max) = 70 emu/g at a 2 T magnetic field was achieved in the ferromagnetic state. The addition of SeS2 as a low-temperature sintering aid improved the material's density and thermal conductivity by approximately 45% and 275%, respectively. The (Gd5Si2.4Ge1.6)(0.9)(SeS2)(0.1) alloy is confirmed as a suitable composite material for low-grade waste heat recovery in thermomagnetic applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Multidisciplinary
Zhang Yan, Zong Shuo-Tong, Sun Zhi-Gang, Liu Hong-Xia, Chen Feng-Hua, Zhang Ke-Wei, Hu Ji-Fan, Zhao Tong-Yun, Shen Bao-Gen
Summary: This study investigates the magnetic properties, magnetocaloric effects, and magnetic anisotropies of rapidly quenched HoCoSi compounds. The results show that the material exhibits a large low-field magnetocaloric effect and obvious magnetic anisotropy, making it suitable for magnetic refrigeration technology of rotating samples.
ACTA PHYSICA SINICA
(2022)
Article
Chemistry, Physical
P. Sivaprakash, S. Arumugam, S. Esakki Muthu, D. M. Raj Kumar, C. Saravanan, N. V. Rama Rao, Y. Uwatoko, R. Thiyagarajan
Summary: The effect of Si substitution on the Mn site in Ni47Mn40-xSixIn13 alloy was investigated for its structure, electrical, magnetic, and magnetocaloric properties. Increasing Si content lowered both the Curie transition and martensitic phase transition temperatures, leading to exchange bias phenomenon at lower temperatures. The maximum magnetic entropy change decreased with higher Si content, indicating a decrease in magnetocaloric effect.
Article
Physics, Applied
Subrata Ghosh, Saheli Samanta, J. Sridhar Mohanty, Jayee Sinha, Kalyan Mandal
Summary: The coincidence of magnetic and structural transitions in (MnNiSi)(1-x)(FeNiGa)(x) alloys near room temperature leads to giant magnetocaloric effects, making them ideal for cooling technology.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Abdul Ahad Khan, Zeshan Zada, Ali H. Reshak, Jehan Akbar, Muhammad Saqib, Muhammad Azhar Naeem, Muhammad Ismail, Sabeen Zada, G. Murtaza, Amel Laref, Muhammad M. Ramli
Summary: Our study presents a first principles investigation of the structural, electronic, and magnetic properties of ThCo2X2 (X = Si, Ge) compound. By using different potential methods, we optimize the stable ferromagnetic phase and find that ThCo2Ge2 compound exhibits stronger ferromagnetism compared to ThCo2Si2 compound.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Aichi Yamashita, Tatsuma D. Matsuda, Yoshikazu Mizuguchi
Summary: Research on high-entropy alloy (HEA) superconductors has been increasing recently, with a focus on materials science and condensed matter physics fields. In our study, we successfully synthesized two new HEA-type superconductors and confirmed their compositions satisfied the HEA state criteria. Through performance testing and analysis, we found that these new superconductors exhibit characteristics similar to conventional Nb3Sn family superconductors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
J. H. Belo, Y. Mudryk, A. M. Pereira, G. N. P. Oliveira, A. M. L. Lopes, D. Paudyal, L. Morellon, P. A. Algarabel, C. Magen, N. Marcano, V. K. Pecharsky, J. P. Araujo
Summary: The study shows that Indium substitution has a significant impact on the crystal structure, magnetic properties, and magnetocaloric properties of giant magnetocaloric materials, leading to crystallographic changes and a decrease in magnetic entropy change.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
H. R. Zhang, D. M. Liu, Z. L. Zhang, S. B. Wang, M. Yue, Q. Z. Huang, J. W. Lynn
Summary: In this study, the correlation between the in-plane covalent bond length and key properties of MnFePGe magnetocaloric materials, such as Curie temperature and thermal hysteresis, has been established using 54 samples with different compositions. Results show that the thermal hysteresis is most strongly correlated with the change in bond length during the paramagnetic-to-ferromagnetic phase transition, providing insights into how to control the properties of magnetic refrigeration materials for optimal performance.
JOURNAL OF APPLIED PHYSICS
(2021)
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
Materials Science, Ceramics
Shaleni Venkatesan, S. Kavita, Suresh Perumal
Summary: Ni-Mn-In Heusler alloys have attracted considerable attention in magnetic refrigeration due to their eco-friendliness and large magnetocaloric response. This study found that the Ni45Co5Mn37In12Si1 alloy, heat-treated for 15 hours, exhibited larger grains and a dendritic structure, along with a significant change in magnetic entropy and refrigeration capacity, making it suitable for magnetic refrigeration applications.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Yuhu Hu, Huihui Song, Jinyu Fang, Jiale Zhang, Kai Xu, Shuiming Huang, Xueling Hou
Summary: The effect of small dose boron-doping on the nucleation process of nano-sized phases in La-Fe-Si alloys during rapid solidification was investigated. The results showed that boron-doping significantly promoted the formation of the 1:13 phase, and this has important implications for the future engineering application of magnetic refrigeration materials.
Article
Materials Science, Multidisciplinary
Sara Ait Bouzid, Mohammed Sajieddine, El Kebir Hlil, Omar Mounkachi, Mohammed Mansori, Abdelhaq Nassiri, Abdellatif Essoumhi
Summary: The thermal, structural and magnetocaloric properties of La1-xLixMn1-yFeyO3 (x = 0.1, 0.2 and y = 0, 0.1) powders were investigated for application in magnetic refrigeration systems. The Li and Fe doped samples exhibited a rhombohedral structure and a ferromagnetic-paramagnetic transition was observed. The substitution of La by Li led to a decrease in Curie temperature and magnetic entropy change, while the 10% Fe doping resulted in a decrease in Curie temperature, magnetic entropy change and relative cooling efficiency.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Multidisciplinary Sciences
Yung-Yeh Chang, Hechang Lei, C. Petrovic, Chung-Hou Chung
Summary: The mysterious Planckian metal state, which exhibits perfect T-linear resistivity and universal scattering rate, has been observed in the normal state of various strongly correlated superconductors near a quantum critical point. However, its microscopic origin and connection to quantum criticality remain unresolved.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Rubyann Olmos, Po-Hao Chang, Prakash Mishra, Rajendra R. Zope, Tunna Baruah, Yu Liu, Cedomir Petrovic, Srinivasa R. Singamaneni
Summary: Recently, pressure-induced structural and magnetic phase transitions were studied in two quasi-2D sister compounds, CST and MST. Magnetic property measurements showed that the ferromagnetic transition temperature decreases in CST, while in MST, the ferrimagnetic transition temperature increases. Theoretical analysis revealed that exchange coupling in MST is strongly frustrated, with the first nearest neighbor interaction being the most dominant component with the strongest pressure dependence.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Weijiong Chen, Clara Neerup Breio, Freek Massee, Milan P. Allan, Cedomir Petrovic, J. C. Seamus Davis, Peter J. Hirschfeld, Brian M. Andersen, Andreas Kreisel
Summary: The authors used scanning tunneling microscopy to detect the orbital order in the superconductor CeCoIn5, which is enhanced in the superconducting state as predicted. Visualization of atomic-orbital degrees of freedom is a challenge in scanned microscopy. Sublattice-resolved superconductive QPI techniques represent a new approach for studying hidden orbital order.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhixiang Hu, Junze Deng, Hang Li, Michael O. Ogunbunmi, Xiao Tong, Qi Wang, David Graf, Wojciech Radoslaw Pudelko, Yu Liu, Hechang Lei, Svilen Bobev, Milan Radovic, Zhijun Wang, Cedomir Petrovic
Summary: This study reveals that SrAgBi is a type-II three-dimensional Dirac semimetal induced by spin-orbit coupling, with a tilted Dirac cone at the Fermi energy. The presence of 7% vacancy defects on the Ag atomic site does not significantly perturb the charge compensation and Fermi surface characteristics of SrAgBi, suggesting that it could be a promising material for observing robust optical and spintronic topological quantum phenomena.
NPJ QUANTUM MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jaeun Eom, In Hak Lee, Jung Yun Kee, Minhyun Cho, Jeongdae Seo, Hoyoung Suh, Hyung-Jin Choi, Yumin Sim, Shuzhang Chen, Hye Jung Chang, Seung-Hyub Baek, Cedomir Petrovic, Hyejin Ryu, Chaun Jang, Young Duck Kim, Chan-Ho Yang, Maeng-Je Seong, Jin Hong Lee, Se Young Park, Jun Woo Choi
Summary: We investigate the voltage control of magnetism in a van der Waals heterostructure device consisting of the ferromagnetic Fe3-xGeTe2 and ferroelectric In2Se3. We found that gate voltages can effectively modulate the magnetic properties of Fe3-xGeTe2, reducing its coercive field regardless of the voltage polarity. Raman spectroscopy shows that the lattice constants of In2Se3 and Fe3-xGeTe2 increase with voltage for both polarities. This can be attributed to the presence of in-plane tensile strain, which is supported by density functional theory calculations. Our results demonstrate a low-power voltage-controlled van der Waals spintronic device utilizing the magnetoelectric effect in vdW ferromagnetic/ferroelectric heterostructures.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Hector Iturriaga, Luis M. Martinez, Thuc T. T. Mai, Adam J. Biacchi, Mathias Augustin, Angela Hight R. Walker, Mohamed Fathi Sanad, Sreeprasad T. Sreenivasan, Yu Liu, Elton J. G. Santos, Cedomir Petrovic, Srinivasa R. Singamaneni
Summary: Electrochemical intercalation can induce a room temperature ferromagnetic phase in quasi-2D FGT magnet, with Curie temperatures as high as 350 K. This work demonstrates the potential of molecular intercalation in realizing high-temperature vdW magnets in an inexpensive and reliable manner.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yu Liu, Zhixiang Hu, Xiao Tong, David Graf, C. Petrovic
Summary: We report a study on the single crystals of selenospinel Cu6-xFe4+xSn12Se32 (x = 0, 1, 2), which have a cubic structure with the Fd3m space group and exhibit typical semiconductor behavior. The large difference between the activation energy for electrical conductivity Ep (32.3-69.8 meV) and for thermopower ES (3.2-11.5 meV) indicates the presence of a polaronic transport mechanism between 350 and 50 K. As the temperature decreases, it evolves into variable-range hopping conduction. Furthermore, the heat capacity shows a hump around 25(5) K and deviates from the Debye T3 law at low temperatures, suggesting the observation of structural glassy features in these crystalline solids.
Article
Materials Science, Multidisciplinary
Xiao Hu, Aashish Sapkota, Zhixiang Hu, Andrei T. Savici, Alexander I. Kolesnikov, John M. Tranquada, Cedomir Petrovic, Igor A. Zaliznyak
Summary: We report inelastic neutron scattering measurements of magnetic excitations in YbMnSb2, a low-carrier density Dirac semimetal with antiferromagnetic Mn layers and Dirac fermions in Sb layers. The observed broadening of spin waves suggests substantial spin-fermion coupling, with roughly twice larger spin-wave damping than a sister material YbMnBi2. The stronger interplane interaction between Mn layers in YbMnSb2 implies the same spin-fermion coupling mechanism. Our results establish the systematic understanding of spin-fermion interactions in layered magnetic Dirac materials.
Proceedings Paper
Physics, Applied
J. A. Krieger, Z. Guguchia, R. Khasanov, P. K. Biswas, L. Li, K. Wang, C. Petrovic, E. Morenzoni
Summary: We report microscopic studies on the superconducting properties of (CaxSr1-x)(3)Rh4Sn13 compounds as a function of chemical and hydrostatic pressure. A quantum critical point is found in the superconducting phase, where the superfluid density increases by a factor of two and the superconducting pairing strength reaches a maximum. The enhancement of superconductivity is attributed to the structural phase transition and the suppression of a charge density wave (CDW) at the critical pressure pc. This study suggests that conventional BCS superconductors with competing orders may exhibit unconventional superconducting behavior.
15TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE
(2023)
Article
Materials Science, Multidisciplinary
S. Djurdjic Mijin, A. Solajic, J. Pesic, Y. Liu, C. Petrovic, M. Bockstedte, A. Bonanni, Z. V. Popovic, N. Lazarevic
Summary: The vibrational properties of ferrimagnetic Mn3Si2Te6 single crystals are studied using Raman spectroscopy and density functional theory calculations. Eighteen Raman-active modes are identified, with 14 assigned based on trigonal symmetry. Four additional peaks following A1g selection rules are attributed to overtones. The temperature evolution of the A51g mode self-energy suggests competing short-range magnetic correlations in Mn3Si2Te6 that significantly impact the spin-phonon interaction. This research provides comprehensive insight into lattice properties, explores their temperature dependence, and provides evidence for competing short-range magnetic phases in Mn3Si2Te6.
Article
Physics, Multidisciplinary
Zhixiang Hu, Jahyun Koo, Yong Hu, Qi Wang, Milinda Abeykoon, D. Graf, Yu Liu, Hechang Lei, Junzhang Ma, Ming Shi, Binghai Yan, C. Petrovic
Summary: Ternary intermetallic BaAuSb crystal exhibits both trivial and nontrivial topological Dirac states in the bulk, with the nontrivial Fermi-surface pocket at the Brillouin zone center characterized by a few hundredths of a bare electron mass and high mobility. The conducting states with unusually high Fermi velocities and small masses can be coupled with magnetic moments in materials where Ba is substituted by magnetic rare-earth atoms.
PHYSICAL REVIEW RESEARCH
(2023)
