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The central issue in high-temperature cuprate superconductors is the pseudogap state appearing below the pseudogap temperature $T^*$, which is well above the superconducting transition temperature. In this study, we theoretically…

Strongly Correlated Electrons · Physics 2018-05-22 Takao Morinari

The concept of Perpendicular Shape-Anisotropy Spin-Transfer-Torque Magnetic Random-Access Memory tackles the downsize scalability limit of conventional ultrathin magnetic tunnel junctions (MTJ) below sub-20 nm technological nodes. This…

Mesoscale and Nanoscale Physics · Physics 2023-12-11 N. Caçoilo , L. D. Buda-Prejbeanu , B. Dieny , O. Fruchart , I. L. Prejbeanu

Experiments on high-quality GaAs (311)A two-dimensional holes at low temperatures reveal a remarkable dependence of the magnetoresistance, measured with an in-plane magnetic field ($B$), on the direction of $B$ relative to both the crystal…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 S. J. Papadakis , E. P. De Poortere , M. Shayegan , R. Winkler

Precise magnetic hysteresis measurements of small single crystals of Mn$_{12}$ acetate of spin 10 have been conducted down to 0.4 K using a high sensitivity Hall magnetometer. At higher temperature (>1.6K) step-like changes in magnetization…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 Andrew D. Kent , Yicheng Zhong , Louisa Bokacheva , Daniel Ruiz , David N. Hendrickson , M. P. Sarachik

The isothermal magnetoresistance [R($\theta$)] of [001] and [110] epitaxial films of La$_{2 / 3}$Sr$_{1 / 3}$MnO$_{3}$ measured as a function of the angle $\theta$ between current ($\vec{I}$) and magnetic field ($\vec{H}$), both in the…

Materials Science · Physics 2010-03-09 Soumen Mandal , R. C. Budhani

SSMO5347 thin films (thicknesses ~200 nm) were deposited by on-axis dc magnetron sputtering on the single crystal LSAT (001) substrates. These films are oriented along the out of plane c-direction. The ferromagnetic and insulator-metal…

Materials Science · Physics 2013-01-18 Manoj K. Srivastava , M. P. Singh , Amarjeet Kaur , F. S. Razavi , H. K. Singh

Early work on the iron-arsenide compounds supported the view, that a reduced dimensionality might be a necessary prerequisite for high-Tc superconductivity. Later, however, it was found that the zero-temperature upper critical magnetic…

Superconductivity · Physics 2015-05-20 V. A. Gasparov , F. Wolff-Fabris , D. L. Sun , C. T. Lin , J. Wosnitza

We have investigated the effects of post growth low temperature annealing on the magnetic, electrical and structural properties of (Ga_0.94,Mn_0.06)(As_0.9,P_0.1) layers grown by molecular beam epitaxy. By controlling the annealing time we…

Magnetocrystalline anisotropy at Heusler alloy$|$MgO interfaces have been studied using first principles calculations. It is found that Co terminated Co$_{2}$FeAl$|$MgO interfaces show perpendicular magnetic anisotropy up to 1.31 mJ/m$^2$,…

Materials Science · Physics 2016-09-19 Rajasekarakumar Vadapoo , Ali Hallal , Hongxin Yang , Mairbek Chshiev

We examine the interplay between anisotropy of the in-plane magnetization and the nodal gap structure on the basis of the approximate analytic solution in the quasiclassical formalism. We show that a four-fold oscillation appears in the…

Superconductivity · Physics 2009-11-10 Hiroaki Kusunose

The angular and temperature dependence of the upper critical field Hc2 in MgB2 was determined from torque magnetometry measurements on single crystals. The Hc2 anisotropy gamma_H was found to decrease with increasing temperature, in…

Superconductivity · Physics 2009-11-07 M. Angst , R. Puzniak , A. Wisniewski , J. Roos , H. Keller , P. Miranovic , J. Jun , S. M. Kazakov , J. Karpinski

Precise thermal expansion and magnetostriction studies of the intermetallic compound Eu$_2$CuSi$_3$ in the temperature range between 5 and 300 K are presented. A clear sign of magnetic second order phase transition at the ferromagnetic…

Strongly Correlated Electrons · Physics 2017-02-03 Liran Wang , Lars Wallbaum , Changhyun Koo , Chongde D. Cao , Wolfgang Löser , Rüdiger Klingeler

Angular-dependent in-plane magnetoresistance (AMR) for single crystal $Na_{0.34}(H_3O)_{0.15}CoO_2$ with charge ordering is studied systematically. The anisotropic magnetoresistance shows a twofold symmetry at high temperature with rotating…

Strongly Correlated Electrons · Physics 2009-11-11 C. H. Wang , X. H. Chen , G. Wu , T. Wu , H. T. Zhang , J. L. Luo , G. T. Liu , N. L. Wang

In intercalated transition metal dichalcogenide $Fe_xTaS_2$ (0.2 $\leq$ x $\leq$ 0.4) single crystals, large magnetic anisotropy is observed. Transport property measurements indicate that heavy Fe-doping leads to a large anisotropy of…

Strongly Correlated Electrons · Physics 2017-05-10 G. Wu , B. L. Kang , Y. L. Li , T. Wu , N. Z. Wang , X. G. Luo , Z. Sun , L. J. Zou , X. H. Chen

We report the temperature dependencies of the upper critical fields $H_{c\text{2}}^{\text{c}}(T)$ parallel to the c-axis and $H_{c\text{2}}^{\text{ab}}(T)$ parallel to the ab-plane of single crystalline CaKFe$_4$As$_4$ inferred from the…

Anisotropic charge transport is observed in a two-dimensional (2D) hole system in a perpendicular magnetic field at filling factors nu=7/2 and nu=11/2 for temperatures below 150mK. In stark contrast, the transport at nu=9/2 is isotropic for…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 M. J. Manfra , Z. Jiang , S. H. Simon , L. N. Pfeiffer , K. W. West , A. M. Sergent

A study of the anisotropy in magnetic, transport and magnetotransport properties of FeSb2 has been made on large single crystals grown from Sb flux. Magnetic susceptibility of FeSb2 shows diamagnetic to paramagnetic crossover around 100K.…

Strongly Correlated Electrons · Physics 2009-11-07 C. Petrovic , J. W. Kim , S. L. Bud'ko , A. I. Goldman , P. C. Canfield , W. Choe , G. J. Miller

Using dc and ac magnetometry, the pressure dependence of the magnetization of the three-dimensional antiferromagnetic coordination polymer Mn(N(CN)$_{2}$)$_{2}$ was studied up to 12 kbar and down to 8K. The magnetic transition temperature,…

Materials Science · Physics 2015-02-03 P. A. Quintero , D. Rajan , M. K. Peprah , T. V. Brinzari , R. S. Fishman , D. R. Talham , M. W. Meisel

We present the high-temperature (70 K < T < 300 K) resistivity anisotropy and Hall effect measurements of the quasi-one-dimensional (1D) organic conductor (TMTTF)2AsF6. The temperature variations of the resistivity are pronouncedly…

Strongly Correlated Electrons · Physics 2009-11-11 Bojana Korin-Hamzic , Emil Tafra , Mario Basletic , Amir Hamzic , Martin Dressel

We report on the magnetic properties and the crystallographic structure of the cobalt nanowire arrays as a function of their nanoscale dimensions. X-ray diffraction measurements show the appearance of an in-plane HCP-Co phase for nanowires…

Materials Science · Physics 2009-11-24 J. Sanchez-Barriga , M. Lucas , F. Radu , E. Martin , M. Multigner , P. Marin , A. Hernando , G. Rivero