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The tetrameric Ni(II) spin cluster Ni4Mo12 has been studied by INS. The data were analyzed extensively in terms of a very general spin Hamiltonian, which includes antiferromagnetic Heisenberg interactions, biquadratic 2-spin and 3-spin…

介观与纳米尺度物理 · 物理学 2010-06-11 J. Nehrkorn , M. Höck , M. Brüger , H. Mutka , J. Schnack , O. Waldmann

We describe powder and single-crystal inelastic neutron scattering experiments on a spinel-type antiferromagnet GeCo$_2$O$_4$, represented by an effective total angular momentum J_eff = 1/2. Several types of non-dispersive short-range…

The electric-current stabilized semi-metallic state in the quasi-two-dimensional Mott insulator Ca$_2$RuO$_4$ exhibits an exceptionally strong diamagnetism. Through a comprehensive study using neutron and X-ray diffraction, we show that…

Recent STM experiments and theoretical considerations have highlighted the role of interaction-driven orbital selectivity in FeSe, and its role in generating the extremely anisotropic superconducting gap structure in this material. We study…

超导电性 · 物理学 2019-01-08 Andreas Kreisel , Brian M. Andersen , P. J. Hirschfeld

The precise measurement of neutrino properties is among the highest priorities in fundamental particle physics, involving many experiments worldwide. Since the experiments rely on the interactions of neutrinos with bound nucleons inside…

Spin-1/2 chains with alternating antiferromagnetic (AF) and ferromagnetic (FM) couplings exhibit quantum entanglement like the integer-spin Haldane chains and might be similarly utilized for quantum computations. Such alternating AF-FM…

The PANDAX-4T and XENONnT experiments present indications of Coherent Elastic Neutrino Nucleus Scattering (CE$\nu$NS) from ${}^{8}$B solar neutrinos at 2.6$\sigma$ and 2.7$\sigma$, respectively. This constitutes the first observation of the…

高能物理 - 唯象学 · 物理学 2025-08-04 Pablo Blanco-Mas , Pilar Coloma , Gonzalo Herrera , Patrick Huber , Joachim Kopp , Ian M. Shoemaker , Zahra Tabrizi

In this article, we report on inelastic neutron scattering measurements on a quasi-1D antiferromagnet BaCo$_2$V$_2$O$_8$ under a transverse magnetic field applied along the (0,1,0) direction. Combining results of inelastic neutron…

强关联电子 · 物理学 2024-07-30 Xiao Wang , Konrad Puzniak , Karin Schmalzl , C. Balz , M. Matsuda , Akira Okutani , M. Hagiwara , Jie Ma , Jianda Wu , Bella Lake

This paper presents results of a recent study of multiferroic \CCO\ by means of single crystal neutron diffraction. This system has two close magnetic phase transitions at $T\nsub{N1}=24.2$ K and $T\nsub{N2}=23.6$ K. The low temperature…

材料科学 · 物理学 2015-05-30 M. Frontzek , G. Ehlers , A. Podlesnyak , H. Cao , M. Matsuda , O. Zaharko , N. Aliouane , S. Barilo , S. V. Shiryaev

By performing time-of-flight neutron scattering measurements on a large amount of single crystals of Sr$_2$RuO$_4$, we studied detailed structure of the imaginary part of the dynamic spin susceptibility over a wide range of phase space. In…

强关联电子 · 物理学 2015-05-28 K. Iida , M. Kofu , N. Katayama , J. Lee , R. Kajimoto , Y. Inamura , M. Nakamura , M. Arai , Y. Yoshida , M. Fujita , K. Yamada , S. -H. Lee

The crystal structure of the double tungstate NaFe(WO$_4$)$_2$ arises from that of the spin-driven multiferroic MnWO$_4$ by inserting non-magnetic Na layers. NaFe(WO$_4$)$_2$ exhibits a three-dimensional incommensurate spin-spiral structure…

Many molecular magnetic clusters, such as single-molecule magnets, are characterized by spin ground states with defined total spin S exhibiting zero-field-splittings. In this work, the spectroscopic intensities of the transitions within the…

介观与纳米尺度物理 · 物理学 2009-11-11 O. Waldmann , H. U. Güdel

We measured two magnetic modes with finite and discrete energies in an antiferromagnetic ordered phase of a geometrically frustrated magnet MgCr2O4 by single-crystal inelastic neutron scattering, and clarified the spatial spin correlations…

强关联电子 · 物理学 2008-10-22 K. Tomiyasu , H. Suzuki , M. Toki , S. Itoh , M. Matsuura , N. Aso , K. Yamada

Very recently we revealed a large family of triangular lattice quantum spin liquid candidates named rare-earth chalcogenides, which features a high-symmetry structure without structural/charge disorders and spin impurities, and may serve as…

Inelastic neutron scattering measurements on the archetypical electron-doped material Nd{1.85}Ce{0.15}CuO4 up to high relative magnetic field strength, H/Hc2 ~ 50%, reveal a simple linear magnetic-field effect on the superconducting…

超导电性 · 物理学 2007-05-23 E. M. Motoyama , P. K. Mang , D. Petitgrand , G. Yu , O. P. Vajk , I. M. Vishik , M. Greven

Quite a few low-dimensional magnets are quantum-disordered ``spin liquids'' with a characteristic gap in the magnetic excitation spectrum. Among these are antiferromagnetic chains of integer quantum spins. Their generic feature are…

强关联电子 · 物理学 2009-11-11 A. Zheludev

Inelastic neutron scattering is used to study transverse-polarized magnetic excitations in the quasi-one-dimensional S=1/2 antiferromagnet BaCu_2Si_2O_7, where the saturation value for the N\'eel order parameter is $m_0=0.12 \mu_{\rm B}$…

We investigate the magnetic and crystal electric field (CEF) states of the Kondo lattice system CeCuGa3 by muon spin relaxation (muSR), neutron diffraction, and inelastic neutron scattering (INS) measurements. A noncentrosymmetric…

A systematic study of magnetocrystalline anisotropy is performed for R(La/Ce/Nd)2Fe14B tetragonal compound with the site substitution mechanism. Theoretical calculation suggests the 50% doping with Ce at 4f-site can lead to competitive…

材料科学 · 物理学 2018-06-07 Rajiv K. Chouhan , Arjun K. Pathak , D. Paudyal , V. K. Pecharsky

In this paper we use the important interferences of Macro-Orbital theory of superfluidity clubbed with several factors that can change the rotational constant (B) and vibrational frequency of N2O in 4HeN-N2O clusters with N to account for…

其他凝聚态物理 · 物理学 2011-09-08 Samrat Dey , Ashok K. Jha , Yatendra S. Jain