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We have performed AC susceptibility and DC magnetic relaxation measurements on the spin ice system Dy$_2$Ti$_2$O$_7$ down to 0.08 K. The relaxation time of the magnetization has been estimated below 2 K down to 0.08 K. The spin dynamics of…

Strongly Correlated Electrons · Physics 2012-02-07 K. Matsuhira , C. Paulsen , E. Lhotel , C. Sekine , Z. Hiroi , S. Takagi

We investigate the low-field relaxation of nuclear hyperpolarization in undoped and highly doped silicon microparticles at room temperature following removal from high field. For nominally undoped particles, two relaxation time scales are…

Mesoscale and Nanoscale Physics · Physics 2011-07-21 M. Lee , M. C. Cassidy , C. Ramanathan , C. M. Marcus

We report measurements of 19F nuclear spin-lattice relaxation 1/T1 as a function of temperature and external magnetic field in LiY0.998Ho0.002F4 single crystal, a single-ion magnet exhibiting interesting quantum effects. The 19F 1/T1 is…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 M. J. Graf , A. Lascialfari , F. Borsa , A. M. Tkachuk , B. Barbara

Understanding and controlling spin relaxation in molecular qubits is essential for developing chemically tunable quantum information platforms. We present a fully first-principles framework for computing the spin relaxation tensor in a…

Quantum Physics · Physics 2025-07-25 Roman Dmitriev , Nosheen Younas , Yu Zhang , Andrei Piryatinski , Eric R. Bittner

Spin relaxation of a single electron in a weakly coupled double quantum dot is calculated numerically. The phonon assisted spin flip is allowed by the presence of the linear and cubic spin-orbit couplings and nuclear spins. The rate is…

Mesoscale and Nanoscale Physics · Physics 2014-09-02 Martin Raith , Thomas Pangerl , Peter Stano , Jaroslav Fabian

We consider the isotropic $S=1$ Heisenberg chain with a finite Haldane gap $\Delta$ and use state-of-the-art numerical techniques to investigate its dynamical properties at finite temperature, focusing on the nuclear spin-lattice relaxation…

Strongly Correlated Electrons · Physics 2019-09-19 Sylvain Capponi , Maxime Dupont , Anders W. Sandvik , Pinaki Sengupta

We measure the dissipation and frequency shift of a magnetically coupled cantilever in the vicinity of a silicon chip, down to $25$ mK. The dissipation and frequency shift originates from the interaction with the unpaired electrons,…

Mesoscale and Nanoscale Physics · Physics 2016-01-22 A. M. J. den Haan , J. J. T. Wagenaar , J. M. de Voogd , G. Koning , T. H. Oosterkamp

Non-resonant ferromagnetic x-ray diffraction has been used to separate the spin and orbital contribution to the magnetization density of the proposed zero-moment ferromagnet $Sm_{0.982}Gd_{0.018} Al_{2}$. The alignment of the spin and…

Condensed Matter · Physics 2009-11-07 J. W. Taylor , J. A. Duffy , A. M. Bebb , M. R. Lees , L. Bouchenoire , S. D. Brown , M. J. Cooper

Magnetoresistance of substituted lanthanum manganite (La0.5Eu0.5)0.7Pb0.3MnO3 in the pulse magnetic field H = 25 T was measured at different temperatures. Magnetoresistance relaxation with a characteristic time of 10 -3 s was found. It has…

Materials Science · Physics 2012-04-19 A. A. Bykov , S. I. Popkov , K. A. Shaykhutdinov , K. A. Sablina

We report experimental studies of coherent population trapping and spin relaxation in a temperature range between 4 K and 100 mK in a silicon vacancy (SiV) center subject to a transverse magnetic field. Near and below 1 K, phonon-induced…

Quantum Physics · Physics 2024-09-24 Shuhao Wu , Xinzhu Li , Ian Gallagher , Benjamin Lawrie , Hailin Wang

We measure magnetization changes in a single crystal of the single-molecule magnet Fe8 when exposed to intense, short (<20 $\mu$s) pulses of microwave radiation resonant with the m = 10 to 9 transition. We find that radiation induces a…

Mesoscale and Nanoscale Physics · Physics 2008-03-14 M. Bal , Jonathan R. Friedman , W. Chen , M. T. Tuominen , C. C. Beedle , E. M. Rumberger , D. N. Hendrickson

We investigate the electron and hole spin relaxation in an ensemble of self-assembled InAs/In$_{0.53}$Al$_{0.24}$Ga$_{0.23}$As/InP quantum dots with emission wavelengths around $1.5$~$\mu$m by pump-probe Faraday rotation spectroscopy.…

Mesoscale and Nanoscale Physics · Physics 2019-01-01 A. V. Mikhailov , V. V. Belykh , D. R. Yakovlev , P. S. Grigoryev , J. P. Reithmaier , M. Benyoucef , M. Bayer

We present measurements on nuclear spin relaxation probed by a single quantum dot in a high-mobility electron gas. Current passing through the dot leads to a spin transfer from the electronic to the nuclear spin system. Applying electron…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 A. K. Huettel , J. Weber , A. W. Holleitner , D. Weinmann , K. Eberl , R. H. Blick

Based on a model Hamiltonian with a d-wave pairing interaction and a competing antiferromagnetic interaction, we numerically study the site dependence of the nuclear spin resonance (NMR) relaxation rate T_1^{-1} as a function of temperature…

Superconductivity · Physics 2007-05-23 Yan Chen , Jian-Xin Zhu , C. S. Ting

The relaxation phenomena of spin-torque oscillators consisting of nanostructured ferromagnets are interesting research targets in magnetism. A theoretical study on the relaxation time of a spin-torque oscillator from one self-oscillation…

Mesoscale and Nanoscale Physics · Physics 2017-07-10 Tomohiro Taniguchi , Takahiro Ito , Sumito Tsunegi , Hitoshi Kubota , Yasuhiro Utsumi

The description of the tunneling of a macroscopic variable in the presence of a bath of localized spins is a subject of great fundamental and practical interest, and is relevant for many solid-state qubit designs. Instead of focusing on the…

Mesoscale and Nanoscale Physics · Physics 2007-12-05 Andrea Morello , L. J. de Jongh

Magnetization and susceptibility studies on single crystals of the pyrochlore Ho$_{2}$Ti$_{2}$O$_{7}$ are reported for the first time. Magnetization isotherms are shown to be qualitatively similar to that predicted by the nearest neighbor…

Disordered Systems and Neural Networks · Physics 2009-11-07 A. L. Cornelius , J. S. Gardner

Isothermal magnetic field dependence of magnetization and the magnetic relaxation measurements were performed for $H$$\parallel$c axis on single crystal of Ba(Fe$_{0.935}$Co$_{0.065}$)$_2$As$_2$ pnictide superconductor having $T_c$ = 21.7…

Superconductivity · Physics 2018-01-17 Shyam Sundar , J. Mosqueira , A. D. Alvarenga , D. Sóñora , A. S. Sefat , S. Salem-Sugui

The magnetocaloric effect of polycrystalline samples of pure and Y-doped dipolar spin ice Dy2Ti2O7 was investigated at temperatures from nominally 0.3 K to 6 K and in magnetic fields of up to 2 T. As well as being of intrinsic interest, it…

Soft Condensed Matter · Physics 2015-06-25 M. Orendac , J. Hanko , E. Cizmar , A. Orendacova , M. Shirai , S. T. Bramwell

We show that in the severe slowing down temperature regime the relaxation of antiferromagnetic rings and similar magnetic nanoclusters is governed by the quasi-continuum portion of their quadrupolar fluctuation spectrum and not by the…

Other Condensed Matter · Physics 2009-07-07 Ioannis Rousochatzakis , Andreas Laeuchli , Ferdinando Borsa , Marshall Luban
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