Applied Magnetic Resonance最新文献_第8页

High-Field THz ESR Measurements of One-Dimensional Frustrated Spin System Using Magnetically Aligned Powder Sample 利用磁对准粉末样品对一维受挫自旋系统进行高场太赫兹ESR测量

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-23 DOI: 10.1007/s00723-025-01813-9

Susumu Okubo, Yoko Sueyasu, Shigeo Hara, Takahiro Sakurai, Hitoshi Ohta, Mitsuru Akaki, Masayuki Hagiwara, Fumiko Kimura, Tsunehisa Kimura, Kazuhiro Nawa, Yoshihiko Okamoto, Zenji Hiroi

{"title":"High-Field THz ESR Measurements of One-Dimensional Frustrated Spin System Using Magnetically Aligned Powder Sample","authors":"Susumu Okubo, Yoko Sueyasu, Shigeo Hara, Takahiro Sakurai, Hitoshi Ohta, Mitsuru Akaki, Masayuki Hagiwara, Fumiko Kimura, Tsunehisa Kimura, Kazuhiro Nawa, Yoshihiko Okamoto, Zenji Hiroi","doi":"10.1007/s00723-025-01813-9","DOIUrl":"10.1007/s00723-025-01813-9","url":null,"abstract":"<div>Terahertz electron spin resonance (THz ESR) measurements of the S = 1/2 frustrated J1–J2 chain material NaCuMoO4(OH) were conducted on a quasi-single-crystal (QSC) sample in a pulsed high magnetic field. The QSC sample was fabricated by modulating the rotation of powder sample in a static magnetic field, resulting in three-dimensional alignment. This paper presents the fabrication method for the QSC sample which was confirmed by the Laue pattern obtained by X-ray diffraction, and the degree of orientation indicated by the anisotropic spectrum of ESR. The THz ESR measurements on the QSC sample of NaCuMoO4(OH) were performed from 0.06 to 1.56 THz, and we observed ESR spectra for the single axis (b-axis) above the saturation field. We demonstrate that the fabrication of magnetically aligned samples allows the observation of sharp single-axis absorption, even in the THz ESR range, which is challenging for a powder samples with a broad linewidth. Furthermore, we establish that this method is an effective approach for investigating magnetic anisotropy, even in antiferromagnetic powder samples.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"56 Hitoshi","pages":"1477 - 1487"},"PeriodicalIF":1.1,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145429102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A Special Issue of Applied Magnetic Resonance in Honor of Professor Hitoshi Ohta on His Milestone Year 《应用磁共振》特刊纪念太田仁教授里程碑式的一年

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-23 DOI: 10.1007/s00723-025-01817-5

Tadaaki Ikoma, Vladislav Kataev, Thomas Prisner

引用次数: 0

Electron Spin Resonance in the Double-Perovskite Oxide Antiferromagnet Ba(_2)CoWO(_6) 双钙钛矿氧化物反铁磁体Ba (_2) coco中的电子自旋共振(_6)

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-20 DOI: 10.1007/s00723-025-01811-x

K. Yu. Povarov, J. Wosnitza, A. R. N. Hanna, A. T. M. Nazmul Islam, B. Lake, S. A. Zvyagin

引用次数: 0

Quantum Chemical Studies of the Impacts of Various Aspects of Hydrogen Bonds on the NMR and NQR Parameters of Nitrogen and Carbon Nuclei Within the MraYAA–Nucleoside Inhibitor Binding Pockets 氢键各方面对mrayaa -核苷抑制剂结合袋内氮核和碳核的NMR和NQR参数影响的量子化学研究

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-20 DOI: 10.1007/s00723-025-01815-7

Elahe K. Astani, Hossein Iravani, Farhad Zahedi, Soroush Sardari

{"title":"Quantum Chemical Studies of the Impacts of Various Aspects of Hydrogen Bonds on the NMR and NQR Parameters of Nitrogen and Carbon Nuclei Within the MraYAA–Nucleoside Inhibitor Binding Pockets","authors":"Elahe K. Astani, Hossein Iravani, Farhad Zahedi, Soroush Sardari","doi":"10.1007/s00723-025-01815-7","DOIUrl":"10.1007/s00723-025-01815-7","url":null,"abstract":"<div>Following our recent study, the current work performed to explore and elucidate the impacts of the length/angle of hydrogen bonds (H-bonds) of N–H···O/C–H···O type and the percentage s-character of the σ*N–H/σ*C–H antibonds partner in the charge transfer (CT) interactions on the nuclear shielding, anisotropy, quadrupole coupling constant, and asymmetry parameters of the imide, amide, carboxamide, and annular nitrogens/methine, methylene, and methyl carbons in the interacting inhibitor–residue pairs in capuramycin, carbacaprazamycin, 3ʹ-hydroxymureidomycin A, and muraymycin D2 binding pockets of MraYAA–inhibitor complexes (labeled as the QM models I–IV). The cited parameters were calculated at the M06-2X/6-31G** level by including the solvent effects using the polarizable continuum model. In the cases of the imide, amide, carboxamide, and annular nitrogens, the results outlined that a reduction in the H-bond length and an increase in s-character of the N hybrid in the σ*N–H antibond are associated with a decrease in the 15N nuclear shielding as well as in the 14N quadrupole coupling constant but with an enhancement in the 15N anisotropy and also in the 14N asymmetry parameter. The similar trends were observed for the nuclear shielding–length, nuclear shielding–s-character, anisotropy–length, anisotropy–s-character correlations of the methine, methylene, and methyl carbons. In addition, when the angles of C–H···O H-bonds are close to 180°, the 13C anisotropies increase, while the 13C nuclear shieldings decrease. The information obtained here has an immense impact on predicting the behavior of the 15N/13C chemical shifts with the H-bonding characteristics in the protein–ligand complexes.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"56 12","pages":"1831 - 1865"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145493512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic Excitation in the S = 1/2 One-Dimensional Antiferromagnet with Ising-like Anisotropy by High Field ESR Measurements 高场ESR测量S = 1/2类伊辛各向异性一维反铁磁体的磁激发

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-14 DOI: 10.1007/s00723-025-01810-y

Shojiro Kimura

引用次数: 0

Temperature Dependence of the Electron–Nuclear Interaction Parameters of the Boron Vacancy in the hBN Crystal hBN晶体中硼空位电子-核相互作用参数的温度依赖性

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-12 DOI: 10.1007/s00723-025-01807-7

Ekaterina Dmitrieva, George Mamin, Irina Gracheva, Fadis Murzakhanov, Marat Gafurov

引用次数: 0

Ferromagnetic Resonance Spectroscopy on the Kagome Magnet MgMn(_{6})Sn(_{6}) Kagome磁体MgMn (_{6}) Sn的铁磁共振光谱研究(_{6})

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-11 DOI: 10.1007/s00723-025-01806-8

Riju Pal, Kakan Deb, Nitesh Kumar, Bernd Büchner, Alexey Alfonsov, Vladislav Kataev

{"title":"Ferromagnetic Resonance Spectroscopy on the Kagome Magnet MgMn(_{6})Sn(_{6})","authors":"Riju Pal, Kakan Deb, Nitesh Kumar, Bernd Büchner, Alexey Alfonsov, Vladislav Kataev","doi":"10.1007/s00723-025-01806-8","DOIUrl":"10.1007/s00723-025-01806-8","url":null,"abstract":"<div>MgMn(_{6})Sn(_{6}) is the itinerant ferromagnet on the kagome lattice with high ordering temperature featuring complex electronic properties due to the nontrivial topological electronic band structure where the spin–orbit coupling (SOC) plays a crucial role. Here, we report a detailed ferromagnetic resonance (FMR) spectroscopic study of MgMn(_{6})Sn(_{6}) aimed to elucidate and quantify the intrinsic magnetocrystalline anisotropy that is responsible for the alignment of the Mn magnetic moments in the kagome plane. By analyzing the frequency, magnetic field, and temperature dependences of the FMR modes, we have quantified the magnetocrystalline anisotropy energy density that reaches the value of approximately (3.5cdot 10^{6}) erg/cm(^{3}) at (T = 3) K and reduces to about (1cdot 10^{6}) erg/cm(^{3}) at (T = 300) K. The revealed significantly strong magnetic anisotropy suggests a sizable contribution of the orbital magnetic moment to the spin magnetic moment of Mn, supporting the scenario of the essential role of SOC for the nontrivial electronic properties of MgMn(_{6})Sn(_{6}).</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"56 Hitoshi","pages":"1507 - 1521"},"PeriodicalIF":1.1,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00723-025-01806-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145429104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Further Development of New Paradigm of the Spin Exchange and Its Manifestations in EPR Spectroscopy in Dilute Solutions of Radicals 自由基稀溶液中自旋交换新范式的进一步发展及其EPR光谱表现

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-11 DOI: 10.1007/s00723-025-01792-x

К.M. Salikhov

{"title":"Further Development of New Paradigm of the Spin Exchange and Its Manifestations in EPR Spectroscopy in Dilute Solutions of Radicals","authors":"К.M. Salikhov","doi":"10.1007/s00723-025-01792-x","DOIUrl":"10.1007/s00723-025-01792-x","url":null,"abstract":"<div>In many fields—molecular biology, medicine, and chemistry—it is important to determine molecular translational mobility and the rate of the spin exchange in bimolecular collisions. This problem can be studied using spin probes and EPR (electron paramagnetic resonance) spectroscopy. Over the years, the widespread model of spin exchange in dilute solutions that is accepted by the majority of the scientific community has been challenged by a number of theoretical and experimental observations. To answer these challenges, I proposed the new paradigm of the spin exchange of paramagnetic particles and their manifestation in EPR spectroscopy of dilute solutions of paramagnetic particles in 2019. Since then, various experiments have been conducted to validate the fundamental principles of the new spin exchange paradigm. In this article, I provide further development of the new paradigm of spin exchange based on experimental confirmation of key predictions including: non-equivalent spin exchange, contribution of dipole–dipole interaction to the coherence transfer, spin polariton appearance, formation of collective modes of partial magnetizations motion, and provide a new interpretation of the effect of exchange narrowing of the spectrum at high rate of spin coherence transfer. One of the most significant results is that each collective mode gives its own resonance line, and these resonance lines in the case of relatively slow transfer of spin coherence from the interaction partner have a mixed shape. It is important to notice that the formation of collective modes of motion applies to any other spectroscopy where decoherence (relaxation) occurs as a result of stationary spectral diffusion.</div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"56 :","pages":"1099 - 1130"},"PeriodicalIF":1.1,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145296680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EPR of Cubic Gd3+ Center in Rb2NaYF6 Single Crystal at T = 295 K Before the Phase Transition Rb2NaYF6单晶中立方Gd3+中心在T = 295 K相变前的EPR

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-09 DOI: 10.1007/s00723-025-01812-w

M. L. Falin, V. A. Latypov, S. L. Korableva

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A Brief History of DIS DIS简史

IF 1.1 4区物理与天体物理

Applied Magnetic Resonance Pub Date : 2025-10-08 DOI: 10.1007/s00723-025-01802-y

Barney L. Bales, Robert N. Schwartz, Miroslav Peric

引用次数: 0