Transport and structural study of pressure-induced magnetic states in Nd0.55Sr0.45MnO3 and Nd0.5Sr0.5MnO3
نویسندگان
چکیده
Pressure effects on the electron transport and structure of Nd12xSrxMnO3 (x50.45, 0.5) were investigated in the range from ambient to ;6 GPa. In Nd0.55Sr0.45MnO3, the low-temperature ferromagnetic metallic state is suppressed and a low-temperature insulating state is induced by pressure. In Nd0.5Sr0.5MnO3, the CE-type antiferromagnetic charge-ordering state is suppressed by pressure. Under pressure, both samples have a similar electron-transport behavior although their ambient ground states are much different. It is surmised that pressure induces an A-type antiferromagnetic state at low temperature in both compounds.
منابع مشابه
Introducing and investigating structural and magnetic properties of ribbons Co68.5-xFe4WxSi16.5B11 (x = 0.8, 2) in amorphous and crystalline states
In this study, for the first time, cobalt base ribbons were made by adding two different amounts of tungsten with Co67.7Fe4W0.8Si16.5B11 and Co66.5Fe4W2 Si16.5B11 compounds by melt spinning in the water. The pattern of X-ray diffraction taken from these ribbons shows that these magnetic ribbons are amorphous. By using thermal analysis curves, taken from the ribbons, crystallization temperature...
متن کاملVacancy Defects Induced Magnetism in Armchair Graphdiyne Nanoribbon
Spin-polarized electronic and transport properties of Armchair GraphdiyneNanoribbons (A-GDYNR) with single vacancy (SV), two types of configurations fordouble vacancy (DV1, DV2) and multi vacancy (MV) defects are studied by nonequilibriumGreen’s function (NEGF) combined with density functional theory (DFT).The results demonstrate that the A-GDYNR with the SV has the lowe...
متن کاملInfluence of Induced Magnetic Field and Partial Slip on the Peristaltic Flow of a Couple Stress Fluid in an Asymmetric Channel
This paper describes the effects of induced magnetic field and partial slip on the peristaltic flow of a couple stress fluids in an asymmetric channel. The two dimensional equation of couple stress fluid are simplified by making the assumptions of long wave length and low Reynolds number. The exact solutions of reduced momentum equation and magnetic force function have been computed in wave...
متن کاملHeat transfer in MHD square duct flow of nanofluid with discrete heat sources
The effect of thermal and solutal buoyancy induced by a discrete source of heat and mass transfer in a square duct under the influence of magnetic field, especially at the turbulent regime for the first time is reported. Al2O3/water nanofluid is used with constant heat flux from three discrete heat sources. In the present study, the effects of Reynolds number (100 to 3000), particle volume frac...
متن کاملInvestigation of structural and electronic properties of UY2(Y=Ga,Ge)
In this paper, some of the electronic and structural properties of UY2(Y=Ga,Ge) compounds are investigated. The calculations was conducted using the pseudopotential method based on the density functional theory with PWscf code.. The exchange function is a correlation between GGA.PBE and LDA. The increase in pressure also leads to positive changes in the enthalpy of the system, which indicates t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003