Article
Physics, Condensed Matter
J. L. Jiao, H. P. Zhang, Q. Huang, W. Wang, R. Sinclair, G. Wang, Q. Ren, G. T. Lin, A. Huq, H. D. Zhou, M. Z. Li, J. Ma
Summary: The study investigated the structural and magnetic properties of Mn1+xV2-xO4 (0 < x <= 1), revealing a cubic-to-tetragonal phase transition for x <= 0.3 and the maintenance of a tetragonal lattice for x > 0.3. It was found that the canting angles between V3+ ions decreased with Mn3+ doping, and the ordering of Mn3+ ions was only observed for x > 0.4. The study also used first principles simulation to analyze the orbital effects and exchange energies of Mn2+, Mn3+, and V3+ ions.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
Yongqiang Wang, Jin Zhou, Chenfei Shi, Gaoshang Gong, Huiyun Hu, Yuling Su
Summary: Nonstoichiometric Co/Mn ratio affects Ca3CoMnO6 physical properties, but Co/Mn site doping effect is less studied. Substituting Mn4+ ions with Al3+ ions in Ca3CoMn1-xAlxO6 affects magnetization. Al3+ dilution suppresses short-range antiferromagnetic/ferromagnetic order, while time-dependent magnetization shows nonmonotonic relaxation implying quantum tunneling.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
Yinong Yin, Fanfan Shi, Guo-Qiang Liu, Xiaojian Tan, Jun Jiang, Ashutosh Tiwari, Baohe Li
Summary: This study investigates the magnetic properties and magnetocaloric performance of two high-entropy perovskites. It is found that a spin-glass phase occurs at low temperatures in the high-entropy compounds, leading to a sluggish magnetic transition. The increase in configurational entropy results in large refrigerant capacity for these materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Ceramics
Jiyu Hu, Chaocheng Liu, Min Wang, Meiling Wang, Xucai Kan, Ganhong Zheng, Yongqing Ma
Summary: The single phase of spinel ferrite MgGaFeO4 is successfully prepared by high-temperature solid-state reaction, with a face-centered cubic structure and space group Fd3m. Magnetic properties suggest the presence of intrinsic ferromagnetic interactions and magnetic frustration in the system. Analysis reveals the competitions between antiferromagnetic and ferromagnetic interactions in MgGaFeO4, which drive the observed spin-glass behavior.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Gaoshang Gong, Yaran Duan, Yuying Zuo, Lichen Wang, Jin Zhou, Dewei Liu, Yongqiang Wang, Zheng Wang, Yuling Su
Summary: A series of Ni2+ doped Ca3Co1-xNixMnO6 samples were prepared and studied for their structure, magnetism, and electrical properties. The results revealed that the spin of Ni2+ ions is anti-ferromagnetically coupled to neighboring Mn4+ ions, and the substitution of Ni2+ ions disrupts the macroscopic ferroelectric domains and strengthens the antiferromagnetic structure. Additionally, the doping of Ni2+ ions significantly improves the magnetodielectric coupling effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Rajesh Tripathi, D. T. Adroja, C. Ritter, Shivani Sharma, Chongli Yang, A. D. Hillier, M. M. Koza, F. Demmel, A. Sundaresan, S. Langridge, Wataru Higemoto, Takashi U. Ito, A. M. Strydom, G. B. G. Stenning, A. Bhattacharyya, David Keen, H. C. Walker, R. S. Perry, Francis Pratt, Qimiao Si, T. Takabatake
Summary: In this study, the authors present experimental results on the CeRh1-xPdxSn compound to investigate its spin dynamics. The results show that the x=0.1 sample exhibits characteristics of a metallic spin-liquid ground state, while the x=0.2 sample shows spin-liquid behavior. The x=0.5 sample, on the other hand, exhibits a long-range antiferromagnetic ground state.
Article
Chemistry, Multidisciplinary
Dong-Er Cheng, Yi-Yan Wang, Yan Sun, Hui Liang, Dan-Dan Wu, Qiuju Li, Xuefeng Sun, Xiao-Yu Yue
Summary: A new triangular lattice compound Gd3Cu9(OH)(19)Br-8 has been synthesized, and its structure, magnetism and magnetocaloric effect have been studied. The compound exhibits paramagnetic-like behavior at low temperature, suggesting potential application in the field of magnetic refrigeration at low temperature.
Article
Chemistry, Multidisciplinary
Ibtihel Soudani, Khawla Ben Brahim, Abderrazek Oueslati, Houda Slimi, Abdelhedi Aydi, Kamel Khirouni
Summary: The development of multifunctional materials is crucial for enhancing the versatility of materials. Ferrite materials, such as LiMn0.5Fe2O4, show exceptional properties that make them promising for optoelectronic applications and infrared detection.
Article
Multidisciplinary Sciences
Andrew D. King, Cristiano Nisoli, Edward D. Dahl, Gabriel Poulin-Lamarre, Alejandro Lopez-Bezanilla
Summary: Artificial spin ices are frustrated spin systems that can be engineered to allow the design and characterization of exotic emergent phenomena. In this study, a realization of spin ice in a lattice of superconducting qubits was reported, showing control over a fragile degeneracy point and the demonstration of Gauss's law for emergent effective monopoles in two dimensions. This qubit control paves the way for potential future study of topologically protected artificial quantum spin liquids.
Article
Chemistry, Physical
Gaoshang Gong, Jin Zhou, Yaran Duan, Huiyun Hu, Yongqiang Wang, Xuerui Cheng, Yuling Su
Summary: The study reveals that one-dimensional frustrated material Ca3CoMnO6 exhibits weak relaxor ferroelectric behavior and the presence of polar nanoregions, which results in the suppressed macroscopic ferroelectric polarization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Humera Khushi, Sadia Nazir, N. A. Noor, A. Mahmood, Yousef Mohammed Alanazi, Sohail Mumtaz
Summary: The ferromagnetic semiconducting nature of CdHo2Y4 materials is found to be attributed to the p-d hybridization of Ho cations in the lattice. The thermal coefficients play a significant role in evaluating the material's thermal stability, while the dielectric complex function completely describes the optical behavior of the material.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
M. Naseska, P. Sutar, Y. Vaskivskyi, I Vaskivskyi, D. Vengust, D. Svetin, V. V. Kabanov, D. Mihailovic, T. Mertelj
Summary: The spinel-structure CuIr2S4 compound undergoes a unique orbitally-driven three-dimensional Peierls-like insulator-metal transition. Intense femtosecond optical pulse irradiation can induce a structurally inhomogeneous transient state in the low-T symmetry-broken insulating state, before reverting to a disordered weakly conducting state. The transition dynamics to the high-T metallic phase is believed to be governed by first-order-transition nucleation kinetics.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Huda A. Alburaih, Sadia Nazir, Naveed Ahmed Noor, Amel Laref, Ramesh Sharma
Summary: The current study used full-potential methods to investigate the ferromagnetic characteristics of CdTm2Y4(Y= S, Se) spinels. The results revealed the stability of the ferromagnetic state in these materials, as well as their ductile behavior. Additionally, the calculations of thermal stability and thermoelectric efficiency are essential for evaluating the suitability of these materials in waste energy recovery systems and other technological applications.
Article
Materials Science, Multidisciplinary
Keke Feng, Ian Andreas Leahy, Olatunde Oladehin, Kaya Wei, Minhyea Lee, Ryan Baumbach
Summary: We report the synthesis and magnetic properties of GdAuAl4Ge2 and TbAuAl4Ge2, revealing magnetically ordered states at low temperatures and magnetic fluctuations extending into the paramagnetic region. Rich behavior and phase transitions are observed in the ab-plane under applied magnetic fields. The similarity in phase diagrams between the two compounds suggests that factors such as lattice symmetry or interaction may control the magnetism. Similarities to compounds hosting skyrmion lattices are pointed out, highlighting the interest in the LnAuAl4Ge(2) family as reservoirs for complex magnetism and electronic behaviors.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Huanyi Xue, Lijie Wang, Zhongjie Wang, Guanqun Zhang, Wei Peng, Shiwei Wu, Chun-Lei Gao, Zhenghua An, Yan Chen, Wei Li
Summary: This study reports the superconducting properties of LiTi2O4 films with pronounced fourfold rotational symmetry, showing that it is an intrinsic property of the superconducting phase. The study also reveals the unconventional d-wave superconducting Cooper pairs in this superconducting phase.
Article
Physics, Multidisciplinary
Wenshan Hong, Lu Liu, Chang Liu, Xiaoyan Ma, Akihiro Koda, Xin Li, Jianming Song, Wenyun Yang, Jinbo Yang, Peng Cheng, Hongxia Zhang, Wei Bao, Xiaobai Ma, Dongfeng Chen, Kai Sun, Wenan Guo, Huiqian Luo, Anders W. Sandvik, Shiliang Li
Summary: In the study of Sr2CuTe1-xWxO6 using neutron diffraction and mu SR techniques, it was found that the Néel order vanishes at x = 0.025 +/- 0.005. A two-dimensional Heisenberg spin model was used to explain the extreme order suppression, where a W-type impurity induces a deformation of the order parameter with a logarithmic singularity leading to loss of order for any x > 0. In the nonmagnetic phase of Sr2CuTe1-xWxO6, the mu SR relaxation rate exhibits quantum critical scaling with a large dynamic exponent, z approximate to 3, consistent with a random-singlet state.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Condensed Matter
A. D. Pant, K. Ishida, N. Kawamura, S. Matoba, A. Koda, S. Nishimura, K. Shimomura
Summary: In this study, muon spin rotation and relaxation measurements were performed on n-type silicon, revealing the presence of UCMu rotation signal at temperatures below 200 K. Furthermore, the variation in relaxation rates of Mu formed deep inside and near the rear surface of Si suggests the surface effect of UCMu generation in vacuum. The yield of UCMu will be estimated through space-time resolution measurements in future research.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Multidisciplinary Sciences
Ryutaro Okuma, Maiko Kofu, Shinichiro Asai, Maxim Avdeev, Akihiro Koda, Hirotaka Okabe, Masatoshi Hiraishi, Soshi Takeshita, Kenji M. Kojima, Ryosuke Kadono, Takatsugu Masuda, Kenji Nakajima, Zenji Hiroi
Summary: The study reveals the emergence of two-dimensional characteristics in a three-dimensional tetrahedral cluster antiferromagnet due to geometrical frustration, and suggests the occurrence of one-dimensionalization in decoupled layers leading to large spin fluctuations in the classical spin system.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Condensed Matter
Kota Kataoka, Daigorou Hirai, Akihiro Koda, Ryosuke Kadono, Takashi Honda, Zenji Hiroi
Summary: Through thermodynamic measurements, muon spin rotation spectroscopy, and neutron diffraction experiments, it was found that Hg2Os2O7 is an AIAO semimetal and provides an excellent platform for studying the electronic instability of 5d electrons.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Akihiro Koda, Hirotaka Okabe, Masatoshi Hiraishi, Ryosuke Kadono, Katelyn A. Dagnall, Joshua J. Choi, Seung-Hun Lee
Summary: The long charge carrier lifetime of HOIPs is closely related to the rotation of the electric dipoles of methyl ammonium molecules, as evidenced by a muon spin relaxation technique.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Applied
M. Hiraishi, H. Okabe, A. Koda, R. Kadono, H. Hosono
Summary: Studies have found discrepancies between predictions by density functional theory and experimental observations of the electronic states of H in oxides, with Mu appearing simultaneously in neutral and paramagnetic states in oxides. By developing a semi-quantitative model, a systematic understanding of the electronic states of Mu in oxides is achieved, shedding new light on the interactions of Mu with self-induced excitons and the positions of electronic levels.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Condensed Matter
Ryosuke Kadono, Masatoshi Hiraishi, Hirotaka Okabe, Akihiro Koda, Takashi U. Ito
Summary: Magnesium hydride is a promising solid hydrogen storage material, but its slow kinetics and high decomposition temperature hinder small-scale applications. In this study, muons were introduced as pseudo-hydrogen into MgH2 to investigate the corresponding interstitial hydrogen states. Multiple muon states similar to those found in wide-gap oxides were observed, supporting the recently proposed ambipolarity model and its donor/acceptor levels. The results suggest that dehydrogenation stabilizes the interstitial hydrogen state, which has implications for improving hydrogen kinetics.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Applied
M. Hiraishi, A. Koda, H. Okabe, R. Kadono, K. A. Dagnall, J. J. Choi, S. -H. Lee
Summary: Using muon spin relaxation measurements, it was found that the reorientation motion of formamidinium (FA) molecules in formamidinium lead iodide (FAPbI3) is quasi-static below approximately 50 K and increases sharply above this temperature. The motion of FA molecules is influenced by the crystal structure and temperature.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
R. Kadono, M. Miyazaki, M. Hiraishi, H. Okabe, A. Koda, K. Amemiya, H. Nakao
Summary: X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) were used to study the magnetic polarization of ligand O atoms in the weak ferromagnetic (WFM) phase of Sr2IrO4. Magnetic moments at O-A and O-P sites were observed, consistent with prior experiments. It was inferred that the relatively large O-P magnetic moment is induced by Ir 5d xy orbitals. The inversion of O-A moments relative to Ir moments between the two magnetic phases suggests the presence of competing magnetic interactions for O-A.
Article
Materials Science, Multidisciplinary
S. K. Dey, K. Ishida, H. Okabe, M. Hiraishi, A. Koda, T. Honda, J. Yamaura, H. Kageyama, R. Kadono
Summary: The magnetic ground state of oxynitride pyrochlore Lu2Mo2O5-yN2 was studied by muon spin rotation/relaxation experiment. No spin freezing or long-range magnetic order was observed down to 0.3 K. Two separate magnetic domains were detected below -13 K, characterized by differences in spin dynamics.
Article
Materials Science, Multidisciplinary
M. Hiraishi, K. M. Kojima, H. Okabe, A. Koda, R. Kadono, J. Wu, Y. Lu, H. Hosono
Summary: Intermetallic silicide compounds LaScSi and Y5Si3, known as hydrogen storage materials, are now considered as candidates for electrides. Their unique diamagnetic properties, revealed in a muon spin rotation experiment, suggest the presence of electride electrons associated with transition metals, which decrease with increasing hydrogen content.
Article
Materials Science, Multidisciplinary
H. Okabe, M. Hiraishi, A. Koda, S. Takeshita, K. M. Kojima, I Yamauchi, T. Ohsawa, N. Ohashi, H. Sato, R. Kadono
Summary: The electronic and magnetic states of beta-MnO2 with hydrogen impurities were studied using the muon spin rotation technique and density-functional theory. The majority of implanted muons were found to be localized in the oxygen channels and behaved like interstitial protons, with a small percentage forming a charge-neutral state. The presence of hydrogen impurities in the system was shown to act as a shallow donor.
Article
Materials Science, Multidisciplinary
Ping Miao, Zhijian Tan, Sanghyun Lee, Yoshihisa Ishikawa, Shuki Torii, Masao Yonemura, Akihiro Koda, Kazuki Komatsu, Shinichi Machida, Asami Sano-Furukawa, Takanori Hattori, Xiaohuan Lin, Kuo Li, Takashi Mochiku, Ryosuke Kikuchi, Chizuru Kawashima, Hiroki Takahashi, Qingzhen Huang, Shinichi Itoh, Ryosuke Kadono, Yingxia Wang, Feng Pan, Kunihiko Yamauchi, Takashi Kamiyama
Summary: The layered perovskite PrBaCo2O5.5+x exhibits strong negative thermal expansion (NTE) related to spontaneous magnetic order, with a magnetovolume effect (MVE). The MVE in PrBaCo2O5.5+x is discontinuous and originates from a magnetoelectric transition, showing high sensitivity to external stimuli. Unlike known magnetoelectric effects involving crystal structure symmetry breaking, the ME in this cobaltite is purely isostructural, providing potential for new applications.
