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The one-dimensional spin-1/2 $XXZ$ model in a mixed transverse and longitudinal magnetic field is studied. Using the specially developed version of the mean-field approximation the order-disorder transition induced by the magnetic field is…

Strongly Correlated Electrons · Physics 2009-11-10 D. V. Dmitriev , V. Ya. Krivnov

We explore the field-temperature phase diagram of the XY pyrochlore antiferromagnet Er$_2$Ti$_2$O$_7$, by means of magnetization and neutron diffraction experiments. Depending on the field strength and direction relative to the high…

Strongly Correlated Electrons · Physics 2017-05-15 E. Lhotel , J. Robert , E. Ressouche , F. Damay , I. Mirebeau , J. Ollivier , H. Mutka , P. Dalmas de Réotier , A. Yaouanc , C. Marin , C. Decorse , S. Petit

We present a theoretical study of the two-dimensional spiral antiferromagnet Ba2CuGe2O7 in the presence of an external magnetic field. We employ a suitable nonlinear sigma model to calculate the T=0 phase diagram and the associated…

Strongly Correlated Electrons · Physics 2013-09-02 J. Chovan , M. Marder , N. Papanicolaou

The incommensurate magnetic structures and phase diagrams of multiferroics has been explored on the basis of accurate micromagnetic analysis taking into account the spin flexoelecric interaction (Lifshitz invariant). The objects of the…

Materials Science · Physics 2015-06-15 Z. V. Gareeva , A. F. Popkov , S. V. Soloviov , A. K. Zvezdin

Using electron-spin-resonance (ESR) technique we investigate the magnetic structure of CuCrO2, quasi-two-dimensional antiferromagnet with weakly distorted triangular lattice. Resonance frequencies and the excitation conditions in CuCrO2 at…

Strongly Correlated Electrons · Physics 2014-01-31 A. M. Vasiliev , L. A. Prozorova , L. E. Svistov , V. Tsurkan , V. Dziom , A. Shuvaev , Anna Pimenov , A. Pimenov

Applied magnetic fields are an important tuning parameter for artificial spin ice (ASI) systems, as they can drive phase transitions between different magnetic ground states, or tune through regimes with high populations of emergent…

Mesoscale and Nanoscale Physics · Physics 2022-03-14 M. Goryca , X. Zhang , J. D. Watts , C. Nisoli , C. Leighton , P. Schiffer , S. A. Crooker

The dynamical responses of Ising metamagnet (layered antiferromagnet) in the presence of a sinusoidally oscillating magnetic field are studied by Monte Carlo simulation. The time average staggered magnetisation plays the role of dynamic…

Statistical Mechanics · Physics 2011-07-21 Muktish Acharyya

The magnetic properties of alkali-metal peroxychromate K$_2$NaCrO$_8$ are governed by the $S = 1/2$ pentavalent chromium cation, Cr$^{5+}$. Specific heat, magnetocalorimetry, ac magnetic susceptibility, torque magnetometry, and inelastic…

Field-driven phase transitions generally arise from competition between Zeeman energy and exchange or crystal-field anisotropy. Here we present the phase diagram of a frustrated pyrochlore magnet Gd2Ti2O7, where crystal field splitting is…

Statistical Mechanics · Physics 2016-08-31 A. P. Ramirez , B. S. Shastry , A. Hayashi , J. J. Krajewski , D. A. Huse , R. J. Cava

Magnetic excitations in cycloidal magnet LiCu$_2$O$_2$ are explored using THz absorption spectroscopy in magnetic fields up to 12 T. Below the spin ordering temperature we observe eight optically active transitions in the spin system of…

Strongly Correlated Electrons · Physics 2015-05-13 D. Hüvonen , U. Nagel , T. Rõõm , Y. J. Choi , C. L. Zhang , S. Park , S. -W. Cheong

Magnetoelectric multiferroics are key materials for next-generation spintronic devices due to their entangled magnetic and ferroelectric properties. Spiral multiferroics possess ferroelectric polarization and are particularly promising for…

Materials Science · Physics 2024-09-04 Ryota Ono , Igor Solovyev , Sergey Artyukhin

Histogram Monte-Carlo simulation results are presented for the magnetic-field -- temperature phase diagram of the Ising model on a stacked triangular lattice with antiferromagnetic intraplane and ferromagnetic interplane interactions.…

Condensed Matter · Physics 2015-06-25 M. L. Plumer , A. Mailhot

We report comprehensive thermodynamic and neutron scattering measurements on the $S$ = 3/2 antiferromagnet Cs$_2$CoI$_4$, a member of the thoroughly studied family of frustrated magnets Cs$_2MX_4$ ($M$ = Cu, Co, Ru, $X$ = Br, Cl, I, O).…

A nonlocal Landau-type free energy functional of the spin density is developed to model the large variety of magnetic states which occur in the magnetic field-temperature phase diagram of magnetoelectric CuFeO$_2$. Competition among…

Statistical Mechanics · Physics 2009-11-13 M. L. Plumer

Heat capacity and magnetic torque measurements are used to probe the anisotropic temperature-field phase diagram of the frustrated spin dimer compound Ba3Mn2O8 in the field range from 0T to 18T. For fields oriented along the c axis a single…

Strongly Correlated Electrons · Physics 2010-04-15 E. C. Samulon , K. A. Al-Hassanieh , Y. -J. Jo , M. C. Shapiro , L. Balicas , C. D. Batista , I. R. Fisher

The geometrically frustrated magnet Ni3V2O8 undergoes a series of competing magnetic ordering at low temperatures. Most importantly, one of the incommensurate phases has been reported to develop a ferroelectric correlation caused by spin…

Materials Science · Physics 2009-06-26 A. K. Singh , D. Jain , V. Ganesan , A. K. Nigam , S. Patnaik

We study magnetic and multiferroic behavior in Ca$_3$Co$_{2-x}$Mn$_{x}$O$_6$ ($x \sim$0.97) by high-field measurements of magnetization ($M$), magnetostriction ($L$($H$)/$L$), electric polarization ($P$), and magnetocaloric effect. This…

Strongly Correlated Electrons · Physics 2014-02-17 Jae Wook Kim , Y. Kamiya , E. D. Mun , M. Jaime , N. Harrison , J. D. Thompson , V. Kiryukhin , H. T. Yi , Y. S. Oh , S. -W. Cheong , C. D. Batista , V. S. Zapf

In the presence of a magnetic field applied perpendicular to a thin sample layer, a suspension of magnetic colloidal particles (ferrofluid) can form spatially modulated phases with a characteristic length determined by the competition…

Soft Condensed Matter · Physics 2009-11-07 D. Lacoste , T. C. Lubensky

The spin-driven component of electric polarization in a single crystal of multiferroic BiFeO$_{3}$ was experimentally investigated in pulsed high magnetic fields up to 41 T. Sequential measurements of electric polarization for various…

Strongly Correlated Electrons · Physics 2020-01-08 Shiro Kawachi , Shin Miyahara , Toshimitsu Ito , Atsushi Miyake , Nobuo Furukawa , Jun-ichi Yamaura , Masashi Tokunaga

Detailed behavior of the magnetoresistance (MR) is studied in lightly doped antiferromagnetic La_{1.99}Sr_{0.01}CuO_{4}, where, thanks to the weak ferromagnetic moment due to spin canting, the antiferromagnetic (AF) domain structure can be…

Superconductivity · Physics 2009-11-10 Yoichi Ando , A. N. Lavrov , Seiki Komiya