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Thermal expansion, magnetostriction and magnetization measurements under magnetic field and hydrostatic pressure were performed on a $\mathrm{UAu_{2}Si_{2}}$ single crystal. They revealed a large anisotropy of magnetoelastic properties…

We have studied the magnetodielectric and magnetoelastic coupling in TbFe3(BO3)4 single crystals by means of capacitance, magnetostriction and Raman spectroscopy measurements. The data reveal strong magnetic field effects on the dielectric…

We investigate the bulk magnetic, electron paramagnetic resonance, and magneto-optical properties of {Ni4Mo12}, a magnetic molecule with antiferromagnetically coupled tetrahedral {Ni4Mo12} in a diamagnetic molybdenum matrix. The…

In the quest for two-dimensional conducting materials with high ferromagnetic ordering temperature the new family of the layered Fe$_{n}$GeTe$_{2}$ compounds, especially the near-room-temperature ferromagnet Fe$_{4}$GeTe$_{2}$, receives a…

We report on the results of 23Na NMR in the honeycomb lattice magnet Na2Co2TeO6 which has been nominated as a Kitaev material. Measurements of magnetic shift and width of the NMR line as functions of temperature and magnetic field show that…

Strongly Correlated Electrons · Physics 2022-12-21 Jun Kikuchi , Takayuki Kamoda , Nobuyoshi Mera , Yodai Takahashi , Kouji Okumura , Yukio Yasui

The temperature-magnetic-field phase diagram of the mixed honeycomb triangular lattice system K$_{2}$Mn$_{3}$(VO$_{4}$)$_{2}$CO$_{3}$ is investigated by means of magnetization, heat capacity and neutron scattering measurements. The results…

We examine the thermal properties of the spin-1 Heisenberg antiferromagnet on the honeycomb lattice in the presence of an easy-plane single-ion anisotropy as well as the effects of an additional weak in-plane easy-axis anisotropy. In…

Strongly Correlated Electrons · Physics 2022-03-17 Nils Caci , Lukas Weber , Stefan Wessel

Li2RuO3 undergoes a structural transition at a relatively high temperature of 550 K with a distinct dimerization of Ru-Ru bonds on the otherwise isotropic honeycomb lattice. It exhibits a unique herringbone dimerization pattern with a…

Strongly Correlated Electrons · Physics 2019-10-17 Seokhwan Yun , Ki Hoon Lee , Se Young Park , Teck-Yee Tan , Junghwan Park , Soonmin Kang , Daniel I. Khomskii , Younjung Jo , Je-Geun Park

Orthorhombic single crystals of TbMn0.5Fe0.5O3 are found to exhibit spin-reorientation, magnetization reversal and weak ferromagnetism. Strong anisotropy effects are evident in the temperature dependent magnetization measurements along the…

The discovery of ordered magnetism in two-dimensional van der Waals materials at the monolayer limit challenges the Mermin-Wagner theorem, which forbids spontaneous breaking of continuous symmetries in two dimensions at finite temperatures.…

Recent experiments on the Co-based $d^7$ honeycomb materials BaCo$_2$(AsO$_4$)$_2$ and BaCo$_2$(PO$_4$)$_2$ have drawn renewed interest to XXZ models with competing interactions beyond the nearest neighbor exchange. While the case of…

Strongly Correlated Electrons · Physics 2023-01-02 Yoshito Watanabe , Simon Trebst , Ciarán Hickey

Neutron diffraction was used to determine the crystal structure and magnetic ordering pattern of a La2CuO4 single crystal, with and without applied magnetic field. A previously unreported, subtle monoclinic distortion of the crystal…

Strongly Correlated Electrons · Physics 2009-11-11 M. Reehuis , C. Ulrich , K. Prokes , A. Gozar , G. Blumberg , Seiki Komiya , Yoichi Ando , P. Pattison , B. Keimer

Magnetic properties of the $S = 1/2$ antiferromagnet $\alpha$-Cu$_{2}$V$_{2}$O$_{7}$ have been studied using magnetization, Quantum Monte Carlo (QMC) simulations, and neutron diffraction. Magnetic susceptibility shows a broad peak at…

Strongly Correlated Electrons · Physics 2015-08-04 G. Gitgeatpong , Y. Zhao , M. Avdeev , R. O. Piltz , T. J. Sato , K. Matan

Bi3Mn4O12(NO3), in which the Mn4+ ions carry S=3/2, is the first honeycomb lattice system that shows no long-range magnetic order. Using neutron scattering, we have determined that short-range antiferromagnetic correlations develop at low…

Strongly Correlated Electrons · Physics 2010-12-06 M. Matsuda , M. Azuma , M. Tokunaga , Y. Shimakawa , N. Kumada

Cubic spinel GeNi2O4 exhibits intriguing magnetic properties with two successive antiferromagnetic phase transitions (TN1 12.1 and TN2 11.4 K) with the absence of any structural transition. We have performed detailed heat capacity and…

Strongly Correlated Electrons · Physics 2020-12-02 T. Basu , T. Zou , Z. Dun , C. Q. Xu , C. R. Dela Cruz , Tao Hong , H. B. Cao , K. M. Taddei , H. D. Zhou , X. Ke

Magnetism in the orthorhombic metal CaFe$_4$As$_3$ was examined through neutron diffraction for powder and single crystalline samples. Incommensurate (${\bm q}_{\rm m}\approx (0.37-0.39)\times{\bm b}^{\ast}$) and predominantly…

Magnetoelectric materials are attractive for several applications, including actuators, switches, and magnetic field sensors. Typical mechanisms for achieving a strong magnetoelectric coupling are rooted in transition metal magnetism. In…

Materials Science · Physics 2020-10-07 Minseong Lee , Q. Chen , Eun Sang Choi , Q. Huang , Zhe Wang , Langsheng Ling , Zhe Qu , G. H. Wang , J. Ma , A. A. Aczel , H. D. Zhou

Synchrotron x-ray diffraction experiments were performed on BaFe$_2$As$_2$ and Sr(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$ single crystals as a function of temperature and applied magnetic field along the tetragonal $[1 \bar{1} 0]$ direction,…

Superconductivity · Physics 2018-07-02 U. F. Kaneko , C. B. R. Jesus , M. E. Saleta , P. G. Pagliuso , R. R. Urbano , E. Granado

We report that the spin-chain compound Dy2BaNiO5 recently proven to exhibit magnetoelectric coupling below its Neel temperature (T_N) of 58 K, exhibits strong frequency-dependent behavior in ac magnetic susceptibility and complex dielectric…

Strongly Correlated Electrons · Physics 2014-03-18 Tathamay Basu , P. L. Paulose , Kartik K Iyer , Kiran Singh , N. Mohapatra , S. Chowki , Babu Gonde , E. V. Sampathkumaran

Neutron diffraction measurements of a high quality single crystal of CaFe2As2 are reported. A sharp transition was observed between the high temperature tetragonal and low temperature orthorhombic structures at TS = 172.5K (on cooling) and…