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We investigate the spin-current transport through antiferromagnetic insulator (AFMI) by means of the spin-Hall magnetoressitance (SMR) over a wide temperature range in Pt/NiO/Y$_3$Fe$_5$O$_{12}$ (Pt/NiO/YIG) heterostructures. By inserting…

Spin-wave (SW) spectra have theoretically been studied in a thin film of a ferromagnet (FM) on a substrate from a paramagnet (PM) (an FM above the critical temperature) or from superconductor (SC). A spin wave propagating in the FM induces…

Mesoscale and Nanoscale Physics · Physics 2022-06-15 M. A. Kuznetsov , A. A. Fraerman

We report the novel pressure($P$) - temperature($T$) phase diagram of antiferromagnetism and superconductivity in CeRhIn$_5$ and CeIn$_3$ revealed by the $^{115}$In nuclear-spin-lattice-relaxation ($T_1$) measurement. In the itinerant…

Strongly Correlated Electrons · Physics 2009-11-07 S. Kawasaki , T. Mito , G. -q. Zheng , C. Thessieu , Y. Kawasaki , K. Ishida , Y. Kitaoka , T. Muramatsu , T. C. Kobayashi , D. Aoki , S. Araki , Y. Haga , R. Settai , Y. Onuki

Mn$_{3}$Sn is a non-collinear antiferromagnet which displays a large anomalous Hall effect at room temperature. It is believed that the principal contribution to its anomalous Hall conductivity comes from Berry curvature. Moreover, dc…

Strongly Correlated Electrons · Physics 2019-07-24 Bing Cheng , Youcheng Wang , D. Barbalas , Tomoya Higo , S. Nakatsuji , N. P. Armitage

We present a study of the transport properties of thermally generated spin currents in an insulating ferrimagnetic-antiferromagnetic-ferrimagnetic trilayer over a wide range of temperature. Spin currents generated by the spin Seebeck effect…

The low-temperature electronic state of the layered organic charge-transfer salt $\kappa$-(BETS)$_2$FeCl$_4$ was probed by interlayer electrical resistance measurements under magnetic field. Both above and below $T_{\mathrm{N}}=0.47\,$K,…

Strongly Correlated Electrons · Physics 2016-11-09 Michael Kunz , Werner Biberacher , Natalia D. Kushch , Akira Miyazaki , Mark V. Kartsovnik

We experimentally demonstrate the existence of magnetic coupling between two ferromagnets separated by a thin Pt layer. The coupling remains ferromagnetic regardless of the Pt thickness, and exhibits a significant dependence on temperature.…

Materials Science · Physics 2015-06-11 W. L. Lim , N. Ebrahim-Zadeh , H. G. E. Hentschel , S. Urazhdin

We measured a spin polarization above a Pt (111) surface in the vicinity of a Co nanostripe by spin-polarized scanning tunneling spectroscopy. The spin polarization is exponentially decaying away from the Pt/Co interface and is detectable…

We present theoretical studies of temperature dependent diamagnetic-paramagnetic transitions in thin quantum rings. Our studies show that the magnetic susceptibility of metal/semiconductor rings can exhibit multiple sign flips at…

Mesoscale and Nanoscale Physics · Physics 2021-01-04 Neal Blackman , Dentcho A. Genov

The injection of spin polarized electrons from ferromagnetic metals (Fe and Co) into gallium nitride (GaN) via scanning tunneling microscopy (STM) is demonstrated. Electrons from STM tips are injected into the semiconductor. Net circular…

Mesoscale and Nanoscale Physics · Physics 2009-09-25 C. J. Hill , X. Cartoixa , R. A. Beach , D. L. Smith , T. C. McGill

We report measurements of the spin torque efficiencies in perpendicularly-magnetized Pt/Co bilayers where the Pt resistivity $\rho_{Pt}$ is strongly dependent on thickness $t_{Pt}$ . The damping-like spin Hall torque efficiency per unit…

Mesoscale and Nanoscale Physics · Physics 2016-03-30 Minh-Hai Nguyen , D. C. Ralph , R. A. Buhrman

The magnetic field and angular dependencies of the thermopower and Nernst effect of the quasi-two-dimensional organic conductor alpha-(ET)2KHg(SCN)4 are experimentally measured at temperatures below (4 K) and above (9 K) the transition…

Strongly Correlated Electrons · Physics 2015-05-28 D. Krstovska , E. Steven , E. S. Choi , J. S. Brooks

We measured the temperature dependence of the magnetic susceptibility and specific heat and the magnetic-field dependence of the magnetization of CuInVO$_5$. An antiferromagnetically ordered state appears below $T_{\rm N} = 2.7$ K. We…

Strongly Correlated Electrons · Physics 2016-12-21 Masashi Hase , Masashige Matsumoto , Akira Matsuo , Koichi Kindo

Helical magnets are emerging as a novel class of materials for spintronics and sensor applications; however, research on their charge and spin transport properties in a thin film form is less explored. Herein, we report the temperature and…

Spin polarization of neutron matter at finite temperatures and strong magnetic fields up to $10^{18}$ G is studied in the model with the Skyrme effective interaction. It is shown that, together with the thermodynamically stable branch of…

Nuclear Theory · Physics 2010-10-15 A. A. Isayev , J. Yang

Reading the magnetic state of antiferromagnetic (AFM) thin films is key for AFM spintronic devices. We investigate the underlying physics behind the spin Hall magnetoresistance (SMR) of bilayers of platinum and insulating AFM hematite…

We study the electronic states of the magnetically ordered Mn3Pt alloy within the density functional theory. Mn3Pt has been believed that one third of Mn atoms have no magnetic moment in an antiferromagnetic phase (so-called the F-phase)…

Materials Science · Physics 2009-11-13 Yohei Kota , Hiroki Tsuchiura , Akimasa Sakuma

Narrow-gap higher mobility semiconducting alloys In_{1-x}Mn_{x}Sb were synthesized in polycrystalline form and their magnetic and transport properties have been investigated. Ferromagnetic response in In_{0.98}Mn_{0.02}Sb was detected by…

Strongly Correlated Electrons · Physics 2015-05-14 V. N. Krivoruchko , V. Yu. Tarenkov , D. V. Varyukhin , A. I. D'yachenko , O. N. Pashkova , V. A. Ivanov

We report the observation of spin Hall magnetoresistance (SMR) in prototypical bilayers of ferrimagnetic yttrium iron garnet (YIG) and platinum in the frequency range from 0 THz to as high as 1.5 THz. The effect exhibits a strong low-pass…

We report measurements of the resistance of silicon MOSFETs as a function of temperature in high parallel magnetic fields where the 2D system of electrons has been shown to be fully spin-polarized. A magnetic field suppresses the metallic…

Strongly Correlated Electrons · Physics 2009-10-31 K. M. Mertes , Hairong Zheng , S. A. Vitkalov , M. P. Sarachik , T. M. Klapwijk