Article
Materials Science, Multidisciplinary
Ali Osman Ayas, Selda Kilic Cetin, Gonul Akca, Mustafa Akyol, Ahmet Ekicibil
Summary: Magnetic cooling technology, based on the magnetocaloric effect, is an important topic for addressing energy and environmental issues. This review focuses on the material research part of magnetic cooling systems, specifically highlighting the advantages and research points related to perovskite manganites, as well as briefly discussing progress on other material families.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
K. Laajimi, F. Ayadi, M. Kchaw, I Fourati, M. Khlifi, M. H. Gazzah, J. Dhahri, J. Juraszek
Summary: The influence of strontium doping on the structural, magnetic, and magnetocaloric properties of La-based complex oxides has been investigated. Different crystal structures were observed for samples with varying doping concentrations. The magnetic entropy change measurements showed that strontium doping significantly affects the magnetic properties of the material, making it a potential candidate for magnetic refrigeration applications.
SOLID STATE SCIENCES
(2021)
Article
Physics, Applied
Priyanka Bisht, Vipin Nagpal, Gurmeet Singh, Rabindra Nath Mahato
Summary: In this paper, the structural, magnetic, magnetocaloric, and critical properties of perovskite La0.7Ag0.2Bi0.1MnO3 (LABMO) nanocrystalline compound synthesized by the sol-gel method are presented. It is found that the ferromagnetism in LABMO is significantly suppressed upon Bi-doping. The presence of short-range ferromagnetic correlations and the strong Griffith singularity are confirmed. The change in magnetic entropy at different magnetic fields is determined, and the critical behavior of LABMO at transition temperatures is explored using different theoretical models.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
S. Passanante, L. P. Granja, C. Albornoz, D. Vega, D. Goijman, M. C. Fuertes, C. Ferreyra, L. Ghivelder, F. Parisi, M. Quintero
Summary: The magnetic and magnetocaloric properties of bilayers and single layer manganite thin films were studied, and it was found that the bilayers can broaden the temperature range of the magnetocaloric effect without reducing the refrigerant capacity, offering potential for refrigeration device applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
K. P. Shinde, C. Hwang, M. Manawan, Y. -S Choi, S. -Y Park, Y. Jo, S. Lee, D. -H Kim, J. S. Park
Summary: Rare-earth double perovskite oxides exhibit interesting magnetocaloric properties at low temperatures. Ho2NiMnO6 and Ho2CoMnO6 were synthesized using the sol-gel method and their crystalline structures were determined to be monoclinic in the P2(1)/n space group. Magnetic phase transitions were observed at 81.2 K for Ho2NiMnO6 and 73.5 K for Ho2CoMnO6. The presence of a paramagnetic matrix and short-range ferromagnetic clusters causes magnetic disorder and Griffiths phase formation in these double perovskites. The compounds undergo a second-order phase transition, as confirmed by the Arrott plot. The maximum magnetic entropy change (-Delta S) for these compounds at an applied magnetic field of 5 T is 1.7 and 2.2 J kg(-1) K-1, respectively. The presence of transition metals (Ni and Co) in the double perovskite structure leads to lattice distortion and changes in the oxidation states of manganese (Mn3+/Mn4+), thereby affecting the magnetic and magnetocaloric properties. This quantitative study provides a systematic understanding of the magnetocaloric properties of rare-earth double perovskite compounds with ferromagnetic 3d transition elements.
Article
Materials Science, Multidisciplinary
Nirmal Mondal, Soma Chatterjee, Kalipada Das, S. Kumar, I. Das
Summary: In this study, the magnetic properties and magnetocaloric effect of two nanocrystalline La0.17Ca0.83MnO3 samples were investigated. The nanocrystalline compounds showed significant changes in physical properties compared with the bulk counterpart, due to their proximity to the phase boundary. Additionally, the signature of canted magnetic phase was observed in the nanocrystalline sample through magnetocaloric effect study.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Ceramics
P. Amalthi, J. Judith Vijaya, L. John Kennedy, A. Mustafa, M. Bououdina, K. P. Shinde, D. H. Kim
Summary: Through the study of multicomponent perovskite nanomaterials, we found that the substitution of ions can affect the structure, magnetic and magnetocaloric properties of the materials. X-ray diffraction analysis confirmed the presence of a secondary cubic phase Nd2O3. The magnetocaloric effect was assessed through the magnetic-entropy change.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
V. E. Salazar-Munoz, A. Lobo Guerrero, S. A. Palomares-Sanchez
Summary: Efficient implementation of magnetic refrigeration technology relies on reviewing available information in literature. This study presents a summary of the magnetocaloric properties of 231 compounds based on lanthanum manganites, discussing the influence of synthesis methods and substituent cations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhuojia Xie, Zhengguang Zou, Zheng Mao, Xinyu Jiang, Weijian Zhang
Summary: This study investigates the effects of Nd doping on (La0.8-xNdx)Sr0.2MnO3, revealing changes in structural, magnetic, and magnetocaloric properties. The research suggests a potential candidate for magnetic refrigeration technology.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Soma Chatterjee, Dipak Mazumdar, Kalipada Das, I Das
Summary: The modification of magnetic interactions due to the reduction of particle size has been explored in the case of nanocrystalline Gd0.5Sr0.5MnO3 compound. The nanoparticle exhibits different magnetic and magnetocaloric properties compared to its bulk counterpart, with significant magnetocaloric effect observed at low temperatures and a faster disappearance of the magnetic hysteresis loop.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
Gurmeet Singh, Arpit Gaur, Priyanka Bisht, Rabindra Nath Mahato
Summary: The structural, morphological, and magnetocaloric properties of nanocrystalline Pr0.7La0.3MnO3 (PLMO) synthesized through wet chemical Sol-gel method have been studied. The nanocrystalline PLMO was confirmed to have a single-phase nature with an orthorhombic crystal structure and Pbnm space group through Rietveld analysis. The size and microstrain of the crystallites were determined to be approximately 28 nm and 0.00137, respectively, using the Williamson-Hall technique. Transmission electron microscopy revealed the particle size and structural characteristics of the sample. The temperature-dependent magnetization data indicated a paramagnetic to ferromagnetic transition, and the Arrott's plot for nanocrystalline PLMO showed a positive slope, indicating a second-order magnetic phase transition. The maximum magnetic entropy change was found to be 2.47 J kg K-1 under a 5 T external magnetic field. The refrigerant capacity and relative cooling power were calculated as 193.3 J kg(-1) and 277.57 J kg(-1), respectively, under a 5 T applied external magnetic field.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Meenakshi, Priyanka Bisht, Arpit Gaur, Rabindra Nath Mahato
Summary: Cobalt doping has a significant impact on the magnetic and electrical properties of the La0.7Te0.3Mn1-xCoxO3 samples, enhancing the magnetocaloric effect and magnetoresistance, making the samples suitable for multifunctional device applications.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Roman Atanasov, Dorin Ailenei, Rares Bortnic, Razvan Hirian, Gabriela Souca, Adam Szatmari, Lucian Barbu-Tudoran, Iosif Grigore Deac
Summary: This study investigates the properties of bulk and nano-sized Pr0.65Sr(0.35-x)CaxMnO3 compounds. Different methods were used for their synthesis. X-ray diffraction reveals a decrease in cell volume with increasing Ca substitution. Optical and transmission electron microscopy were used to study the morphology. The resistivity measurements show features related to grain boundary and ferromagnetic/paramagnetic transition. The Curie temperature decreases with increasing Ca substitution. Bulk samples show high entropy change, making them promising for magnetic refrigeration applications, while the potential of nano-sized samples as magnetocaloric materials is uncertain.
Article
Materials Science, Multidisciplinary
A. M. Aliev, A. G. Gamzatov
Summary: Direct measurements were conducted on La0.7Ca0.3MnO3, La1_xAgyMnO3, and Sm1_xSrxMnO3 manganites to investigate their magnetocaloric effect in alternating magnetic fields. The results showed a decrease in the magnetocaloric effect with increasing field frequency, reaching 20%, 55%, and 70% for La0.7Ca0.3MnO3, Sm1_xSrxMnO3, and La1_xAgyMnO3, respectively. Among the studied materials, La0.7Ca0.3MnO3 exhibited the highest cooling power, making it a promising candidate for magnetic refrigeration technology. A comparison with Gd under the same conditions was conducted.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ziyu Yang, Jun-Yi Ge, Shuangchen Ruan, Hongzhi Cui, Yu-Jia Zeng
Summary: The study reveals that the distorted double-perovskite Gd2ZnTiO6 shows promising magnetocaloric properties as a potential refrigerant material for the liquefaction of helium, with significant magnetic entropy change and cooling power compared to traditional refrigerants.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)