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The spin-spin correlation length and the static structure factor for bilayer antiferromagnets, such as YBa$_2$Cu$_3$O$_{6}$, are calculated using field theoretical and numerical methods. It is shown that these quantities can be directly…

Strongly Correlated Electrons · Physics 2009-10-31 Lan Yin , Matthias Troyer , Sudip Chakravarty

At low temperatures, in strong magnetic fields, the formation of a non-uniform magnetisation is possible in a single-crystal metal sample whose demagnetising factor along the field is close to unity. Namely, so-called Condon diamagnetic…

Soft Condensed Matter · Physics 2007-05-23 Philip Lykov

The magneto-optical technique has been employed to observe spontaneous ferromagnetic domain structures in La0.78Ca0.22MnO3 single crystals. The magnetic domain topology was found to be correlated with the intrinsic twin structure of the…

Strongly Correlated Electrons · Physics 2009-11-11 Grzegorz Jung , Vladimir Markovich , Kees van der Beek , Dmitrii Mogilyansky , Yakov M. Mukovskii

We report results of a multi-frequency (0.8-60 GHz) electron spin resonance study of the spin dynamics in the quasi-2D square lattice antiferromagnet Ba$_2$MnGe$_2$O$_7$ both in antiferromagnetically ordered and paramagnetic phases. We…

Strongly Correlated Electrons · Physics 2024-01-02 V. N. Glazkov , Yu. V. Krasnikova , I. K. Rodygina , H. -A. Krug von Nidda , T. Masuda

Magnetism of the binary intermetallic compound MnGa$_4$ is re-investigated. Band-structure calculations predict antiferromagnetic behavior in contrast to Pauli paramagnetism reported previously. Magnetic susceptibility measurements on…

Materials Science · Physics 2018-05-09 V. Yu. Verchenko , A. A. Tsirlin , D. Kasinathan , S. V. Zhurenko , A. A. Gippius , A. V. Shevelkov

This article reports a detailed x-ray resonant scattering study of the bilayer iridate compound, Sr3Ir2O7, at the Ir L2 and L3 edges. Resonant scattering at the Ir L3 edge has been used to determine that Sr3Ir2O7 is a long-range ordered…

Strongly Correlated Electrons · Physics 2012-08-31 S. Boseggia , R. Springell , H. C. Walker , A. T. Boothroyd , D. Prabhakaran , D. Wermeille , L. Bouchenoire , S. P. Collins , D. F. McMorrow

We present a detailed magnetic study of the Pr1/3Ca2/3MnO3 manganite, where we observe the presence of small ferromagnetic (FM) domains (diameter ~ 10A) immersed within the charge-ordered antiferromagnetic (AFM) host. Due to the interaction…

Materials Science · Physics 2009-11-11 D. Niebieskikwiat , M. B. Salamon

We study electronic properties of AA-stacked graphene bilayers. In the single-particle approximation such a system has one electron band and one hole band crossing the Fermi level. If the bilayer is undoped, the Fermi surfaces of these…

Strongly Correlated Electrons · Physics 2014-08-05 A. O. Sboychakov , A. V. Rozhkov , A. L. Rakhmanov , Franco Nori

The giant magnetoresistance (GMR) of ferromagnetic bilayers with a superconducting contact (F1/F2/S) is calculated in ballistic and diffusive regimes. As in spin-valve, it is assumed that the magnetization in the two ferromagnetic layers F1…

Materials Science · Physics 2009-10-31 N. Ryzhanova , C. Lacroix , A. Vedyayev , D. Bagrets , B. Dieny

We report a steplike lattice transformation of single crystalline (La$_{0.4}$Pr$_{0.6}$)$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$bilayered manganite accompanied by both magnetization and magnetoresistive jumps, and examine the ultrasharp nature of…

Strongly Correlated Electrons · Physics 2009-11-11 M. Matsukawa , Y. Yamato , T. Kumagai , R. Suryanarayanan , S. Nimori

The magnetic strings in antiferromagnetic crystals with the spin $S = 1 /2$ differ from the magnetic polarons (ferrons) by the absence of the additional magnetic moment. We show that in the $S > 1 /2$ double exchange crystals with the…

Strongly Correlated Electrons · Physics 2009-11-07 E. L. Nagaev

Using the path probability and lowest approximation of cluster variation method, we study the dynamic and equilibrium properties of a bilayer magnetic system, consisting of two ferromagnetic monolayers antiferromagnetically coupled for…

Statistical Mechanics · Physics 2024-01-18 C. Ekiz , R. Erdem , D. Semet

Antiferromagnets offer remarkable promise for future spintronics devices, where antiferromagnetic order is exploited to encode information. The control and understanding of antiferromagnetic domain walls (DWs) - the interfaces between…

Spin transfer torque-induced high-frequency dynamics of single thin cobalt-layer nanopillars of circular and elliptical shape have been observed directly. Two types of precessional modes can be identified as a function of magnetic field…

Materials Science · Physics 2012-01-13 N. Müsgens , S. Fahrendorf , T. Maassen , A. Heiss , J. Mayer , B. Özyilmaz , B. Beschoten , G. Güntherodt

We present a theory to describe domain formation observed very recently in a quenched Rb-87 gas, a typical ferromagnetic spinor Bose system. An overlap factor is introduced to characterize the symmetry breaking of M_F=\pm 1 components for…

Other Condensed Matter · Physics 2009-11-13 Qiang Gu , Haibo Qiu

The temperature-dependent behavior of magnetic domains plays an essential role in the magnetic properties of materials, leading to widespread applications. However, experimental methods to access the three-dimensional (3D) magnetic domain…

We report a quasi-one-dimensional S = 1 spin chain compound BaNiTe2O7. This magnetic system has been investigated by magnetic susceptibility, specific heat, and neutron powder diffraction. These results indicate that BaNiTe2O7 develops a…

We report the measurement of spin waves in the bilayer colossal magnetoresistive manganites La(2-2x)Sr(1+2x)Mn2O7 with x=0.30, 0.35 and 0.40. For x=0.35 and 0.40 the entire acoustic and optic dispersion relations are reasonably well…

Strongly Correlated Electrons · Physics 2009-11-07 T. G. Perring , D. T. Adroja , G. Chaboussant , G. Aeppli , T. Kimura , Y. Tokura

In this work, we study the rotating magnetic field driven domain wall (DW) motion in antiferromagnetic nanowires, using the micromagnetic simulations of the classical Heisenberg spin model. We show that in low frequency region, the rotating…

Computational Physics · Physics 2020-01-22 W. H. Li , Z. Y. Chen , D. L. Wen , D. Y. Chen , Z. Fan , M. Zeng , X. B. Lu , X. S. Gao , M. H. Qin

Evidence of flat-band magnetism and half-metallicity in compressed twisted bilayer graphene is provided with first-principles calculations. We show that dynamic band-structure engineering in twisted bilayer graphene is possible by…

Materials Science · Physics 2019-06-05 Alejandro Lopez-Bezanilla