نتایج جستجو برای: magnetic resistivity

تعداد نتایج: 348448  

2016
Valentin Taufour Halyna Hodovanets Stella K. Kim Sergey L. Bud'ko Paul C. Canfield Sergey L. Bud’ko

Thorough resistivity measurements on single crystals of CeZn 11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn 11 orders antiferromagnetically at T N = 2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It q...

2001
C. Doose L. Emery S. H. Kim

The conductive coating on kicker ceramic vacuum chambers was found to affect the pulse width, amplitude, and phase of the kicker magnetic field. Differences in the surface resistivity between the chambers caused each kicker magnetic field to have a slightly different pulse shape, resulting in unwanted betatron oscillations of the stored beam during injection into the storage ring at the Advance...

2001
K. LEFMANN K. K. NUMMILA

We present a systematic investigation of conditions for heat treatment of Rh with the aim of increasing the residual resistivity ratio (RRR). The maximal value of RRR for a 25 μm thick foil was found to be 1050 and the optimal treatment conditions were high temperatures, above 1400◦C, and a low pressure of pure oxygen, around 1 μbar. Another batch of foils, containing less magnetic impurities, ...

2006
A. Malinowski M. Z. Cieplak M. Berkowski

The in-plane transport of strongly underdoped La2−xSrxCuO4 films was examined in the magnetic fields up to 14 T and in temperatures down to 1.6 K. While at high temperatures the samples display metallic-like resistivity, the low-T transport is governed by variable-range-hopping mechanism. Careful analysis shows that the temperature dependence of pre-exponential factor in Mott’s variable-range-h...

2000
Hantao Ji Troy Carter Scott Hsu Masaaki Yamada

A short review of physics results obtained in the Magnetic Reconnection Experiment (MRX) is given with an emphasis on the local features of magnetic reconnection in a controlled environment. Stable two-dimensional (2D) current sheets are formed and sustained by induction using two internal coils. The observed reconnection rates are found to be quantitatively consistent with a generalized Sweet-...

2005
Wei Liu

In preparation for an experimental study of magnetorotational instability (MRI) in liquid metal, we present non-ideal two-dimensional magnetohydrodynamic simulations of the nonlinear evolution of MRI in the experimental geometry. The simulations adopt initially uniform vertical magnetic fields, conducting or insulating radial boundaries, and periodic vertical boundary conditions. No-slip condit...

2016
Zhi Ren Zengwei Zhu Shuai Jiang Xiangfan Xu Qian Tao Cao Wang Chunmu Feng Guanghan Cao Zhu’an Xu

Ternary iron arsenide EuFe2 As2 with ThCr2 Si2 -type structure has been studied by magnetic susceptibility, resistivity, thermopower, Hall, and specific-heat measurements. The compound undergoes two magnetic phase transitions at about 200 and 20 K, respectively. The former was found to be accompanied with a slight drop in magnetic susceptibility (after subtracting the Curie-Weiss paramagnetic c...

2015
H. Ebert W. Bensch

The electronic, magnetic, and transport properties of Fe-intercalated 2H-TaS2 have been investigated by means of the Korringa-Kohn-Rostoker (KKR) method. The nonstoichiometry and disorder in the system have been accounted for using the coherent potential approximation (CPA) alloy theory. A pronounced influence of disorder on the spin magnetic moment has been found for the ferromagnetically orde...

2008
Brian C. Sales Rongying Jin David Mandrus

The Hall resistivity, electrical resistivity, and magnetization of single crystals of the tetragonal ferromagnet Yb14MnSb11 are reported as a function of the direction of the current I and magnetic field H with respect to the principal crystallographic axes. With I along the unique c direction and H in the a-b plane, the anomalous Hall resistivity in the limit of zero applied field is negative ...

Journal: :Journal of forensic sciences 2008
Jamie K Pringle John Jervis John P Cassella Nigel J Cassidy

A simulated clandestine shallow grave was created within a heterogeneous, made-ground, urban environment where a clothed, plastic resin, human skeleton, animal products, and physiological saline were placed in anatomically correct positions and re-covered to ground level. A series of repeat (time-lapse), near-surface geophysical surveys were undertaken: (1) prior to burial (to act as control), ...

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