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Carbon nanotubes continue to be model systems for studies of confinement and interactions. This is particularly true in the case of so-called "ultra-clean" carbon nanotube devices offering the study of quantum dots with extremely low…

Neutron scattering studies have been carried out under the magnetic fields H//[0_11] and H//[001] on a single crystal of Nd2Mo2O7, whose Hall resistivity(rhoH) exhibits quite unusual H- and temperature(T)-dependences. Material parameters…

Strongly Correlated Electrons · Physics 2009-11-11 Yukio Yasui , Taketomo Kageyama , Taketo Moyoshi , Minoru Soda , Masatoshi Sato , Kazuhisa Kakurai

SiO2/Fe/SiO2 sandwich structure films fabricated by sputtering were studied by varying the Fe layer thickness (t_Fe). The structural and microstructural studies on the samples showed that the Fe layer has grown in nanocrystalline form with…

Materials Science · Physics 2026-01-19 Sudhansu Sekhar Das , M. Senthil Kumar

Measurements of the static magnetic susceptibility and of the nuclear magnetic resonance of multiwalled vanadium-oxide nanotubes are reported. In this nanoscale magnet the structural low-dimensionality and mixed valency of vanadium ions…

Strongly Correlated Electrons · Physics 2009-11-11 E. Vavilova , I. Hellmann , V. Kataev , C. Taeschner , B. Buechner , R. Klingeler

{\alpha}-MnTe is a prototypical altermagnet exhibiting a strong anomalous Hall effect (AHE), despite having a nearly vanishing magnetization. Lately, sample-to-sample variations of the amplitude of the AHE have raised concerns of a possible…

The dimensionality of the electronic and magnetic structure of a given material is generally predetermined by its crystal structure. Here, using elastic and inelastic neutron scattering combined with magnetization measurements, we find…

We report clear observations of the magnetic Meissner effect in arrays of superconducting 4 {\AA} carbon nanotubes grown in the linear channels of AlPO4-5 (AFI) zeolite single crystals. Both bulk magnetization and magnetic torque…

Superconductivity · Physics 2015-05-27 Chao Ieong , Zhe Wang , Wu Shi , Yuxing Wang , Ning Wang , Zikang Tang , Ping Sheng , Rolf Lortz

We have systematically investigated the magnetic properties and magnetocaloric effect (MCE) in $R$MnO$_3$ ($R$$=$Dy, Tb, Ho and Yb) single crystals. Above a critical value of applied field ($H_c$), $R$MnO$_3$ undergo a first-order…

Strongly Correlated Electrons · Physics 2011-12-23 A. Midya , S. N. Das , P. Mandal , S. Pandya , V. Ganesan

We show that the magnetic properties of antiferromagnetic layered NiCl$_{2}$ can be altered under nano-sizing depending on dimensionality and morphology type of the corresponding nano-forms. By means of Monte-Carlo simulations within…

Materials Science · Physics 2013-05-30 Andrey N. Enyashin , Alexander L. Ivanovskii

Magnetic properties of high purity stoichiometric La$_2$CuO$_4$ nanoparticles are systematically investigated as a function of particle size. Ferromagnetic single-domain spin clusters are shown to spontaneously form at the surface of fine…

Strongly Correlated Electrons · Physics 2009-11-13 R. V. Yusupov , V. V. Kabanov , D. Mihailovic , K. Conder , K. A. Mueller , H. Keller

We report magnetization, specific heat, muon spin rotation and Na NMR measurements on the S=3/2 rhombohedrally stacked Heisenberg antiferromagnet NaCrO2. This compound appears to be an ideal candidate for the study of triangular Heisenberg…

Strongly Correlated Electrons · Physics 2007-05-23 A. Olariu , P. Mendels , F. Bert , B. G. Ueland , P. Schiffer , R. F. Berger , R. J. Cava

The high magnetic field behaviour of the triangular lattice antiferromagnet CuFeO_2 is studied using single crystal neutron diffraction measurements in a field of up to 14.5 T and also by magnetisation measurements in a field of up to 12 T.…

Strongly Correlated Electrons · Physics 2009-10-31 O. A. Petrenko , G. Balakrishnan , M. R. Lees , D. McK Paul , A. Hoser

By combining first-principles electronic-structure calculations with the model Hamiltonian approach, we systematically study the magnetic properties of sodium superoxide (NaO2), originating from interacting superoxide molecules. We show…

Materials Science · Physics 2013-12-19 I. V. Solovyev , Z. V. Pchelkina , V. V. Mazurenko

We report the results of high-resolution dc magnetization and specific-heat measurements at very low temperatures for a single crystal \color{black} of UBe$_{13}$ in magnetic fields applied along the [001] and [111] directions, in both the…

Magnetization and its relaxation have been measured on Ba0.6K0.4Fe2As2 single crystals with Tc = 39 K. The magnetization hysteresis loops (MHLs) exhibit flux jumps in the low temperature region, and a second peak-effect in the intermediate…

Superconductivity · Physics 2011-12-01 Bing Shen , Huan Yang , Bin Zeng , Cong Ren , Xibin Xu , Hai-Hu Wen

Transport and magnetic studies on polycrystalline samples of SrFe1-xCoxO3-d have been carried out to investigate the relationship between the magnetic structure and the anomalous Hall resistivity rH. The hysteretic behavior of the…

Strongly Correlated Electrons · Physics 2009-11-10 Takahiko Ido , Yukio Yasui , Masatoshi Sato

The de Haas-van Alphen effect (dHvAe) describes the periodic oscillation of the magnetisation in a material as a function of inverse applied magnetic field. It forms the basis of a well established procedure for measuring Fermi surface…

Mesoscale and Nanoscale Physics · Physics 2017-05-03 Johannes Knolle , Nigel R. Cooper

Magnetization curves of MnSi single crystals have been measured in a range of temperatures $T = 5.5 - 35$ K and magnetic field strengths $H \leq 11$ kOe for $H \parallel$ [111], [001], and [110]. Special attention has been paid to the…

Strongly Correlated Electrons · Physics 2014-11-25 V. N. Narozhnyi , V. N. Krasnorussky

Employing a new experimental technique to measure magnetoelectric response functions, we have measured the magnetoelectric effect in composite films of nano granular metallic iron in anatase titanium dioxide at temperatures below 50 K. A…

Materials Science · Physics 2009-11-13 S. D. Yoon , C. Vittoria , V. G. Harris , A. Widom , Y. N. Srivastava

The dielectric constant of multiferroic hexagonal HoMnO_3 exhibits an unprecedented diversity of anomalies at low temperatures (1.8 K< T <10 K) and under external magnetic fields related to magnetic phase transitions in the coupled system…

Strongly Correlated Electrons · Physics 2009-11-11 F. Yen , C. R. dela Cruz , B. Lorenz , Y. Y. Sun , Y. Q. Wang , M. M. Gospodinov , C. W. Chu
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