scholarly journals Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions

2017 ◽  
Vol 96 (6) ◽  
Author(s):  
J. Terzic ◽  
H. Zheng ◽  
Feng Ye ◽  
H. D. Zhao ◽  
P. Schlottmann ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ground State ◽  
Double Perovskite ◽  
Magnetic Ground State

scholarly journals Magnetic ground state of the ordered double-perovskite Sr2YbRuO6 : Two magnetic transitions

2020 ◽  
Vol 102 (13) ◽  
Author(s):  
Shivani Sharma ◽  
D. T. Adroja ◽  
C. Ritter ◽  
D. Khalyavin ◽  
P. Manuel ◽  
...  
Keyword(s):  
Ground State ◽  
Double Perovskite ◽  
Magnetic Transitions ◽  
Magnetic Ground State

scholarly journals Competing Superexchange Interactions in Double Perovskite Osmates

2014 ◽  
Vol 70 (a1) ◽  
pp. C1366-C1366
Author(s):  
Ryan Morrow ◽  
Patrick Woodward
Keyword(s):  
Transition Metal ◽  
Ground State ◽  
Colossal Magnetoresistance ◽  
Double Perovskite ◽  
Transition Metal Ions ◽  
Electronic Configuration ◽  
Magnetic Ground State ◽  
Half Metallic ◽  
Predictive Understanding ◽  
Mixed Transition

Double perovskites, A2BB'O6, containing mixed transition metal ions have exhibited numerous desirable properties such as colossal magnetoresistance, half metallic transport, and high temperature ferrimagnetism. However, a predictive understanding of the superexchange mechanisms which control the magnetism of these materials when they are insulating and B is 3d transition metal and B' is a 4d or 5d transition metal has remained elusive. In this work, a number of insulating double perovskite osmates, A2BOsO6 (A=Sr,Ca,La; B=Cr,Fe,Co,Ni) have been chosen and studied using magnetometry, specific heat, XMCD, and neutron powder diffraction techniques in order to systematically probe the effects of electronic configuration and bonding geometry on the magnetic ground state. It is concluded that the magnetic properties of these materials are controlled by a competition between short range B–O–Os and long range superexchange interactions which are sensitive to bonding geometry resulting in tunability of the magnetic ground state.

Structural, magnetic, and magnetocaloric properties of multiferroic host double perovskite Pr2FeCrO6 compound

2021 ◽  
Author(s):  
Dipak Mazumdar ◽  
Indranil Das
Keyword(s):  
Crystal Structure ◽  
Magnetocaloric Effect ◽  
Ground State ◽  
Double Perovskite ◽  
X Ray Diffraction ◽  
Magnetic Ground State ◽  
X Ray ◽  
Magnetocaloric Properties

We have investigated the crystal structure and nature of the magnetic ground state of polycrystalline Pr2FeCrO6 (PFCO) compound through x-ray diffraction (XRD), magnetization, and magnetocaloric effect studies. Analysis of the...

Magnetic ground state and exchange interactions in the Ising chain ferromagnet CoNb2O6

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Subhash Thota ◽  
Sayandeep Ghosh ◽  
Maruthi R ◽  
Deep C. Joshi ◽  
Rohit Medwal ◽  
...  
Keyword(s):  
Ground State ◽  
Exchange Interactions ◽  
Ising Chain ◽  
Magnetic Ground State

Magnetic Ground State and Electronic Structure Calculations of PbMnO3 Using DFT

2014 ◽  
Vol 895 ◽  
pp. 420-423 ◽  
Author(s):  
Sathya Sheela Subramanian ◽  
Baskaran Natesan
Keyword(s):  
Electronic Structure ◽  
Band Structure ◽  
Fermi Level ◽  
Ground State ◽  
Density Functional ◽  
Electronic Structure Calculations ◽  
Magnetic Ground State ◽  
Electronic Band ◽  
Structure Calculations ◽  
Centrosymmetric Structure

Structural optimization, magnetic ground state and electronic structure calculations of tetragonal PbMnO3have been carried out using local density approximation (LDA) implementations of density functional theory (DFT). Structural optimizations were done on tetragonal P4mm (non-centrosymmetric) and P4/mmm (centrosymmetric) structures using experimental lattice parameters and our results indicate that P4mm is more stable than P4/mmm. In order to determine the stable magnetic ground state of PbMnO3, total energies for different magnetic configurations such as nonmagnetic (NM), ferromagnetic (FM) and antiferromagnetic (AFM) were computed for both P4mm and P4/mmm structures. The total energy results reveal that the FM non-centrosymmetric structure is found to be the most stable magnetic ground state. The electronic band structure, density of states (DOS) and the electron localization function (ELF) were calculated for the stable FM structure. ELF revealed the distorted non-centrosymmetric structure. The band structure and DOS for the majority spins of FM PbMnO3showed no band gap at the Fermi level. However, a gap opens up at the Fermi level in minority spin channel suggesting that it could be a half-metal and a potential spintronic candidate.

scholarly journals Anomalous Magnetic Ground State in anLaAlO3/SrTiO3Interface Probed by Transport through Nanowires

2014 ◽  
Vol 113 (21) ◽  
Author(s):  
A. Ron ◽  
E. Maniv ◽  
D. Graf ◽  
J.-H. Park ◽  
Y. Dagan
Keyword(s):  
Ground State ◽  
Magnetic Ground State

LOW-TEMPERATURE NORMAL-STATE HALL EFFECT IN HIGH-TcBi2Sr2-xLaxCuO6+δ REVEALED BY 60 T MAGNETIC FIELDS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3171-3174
Author(s):  
F. F. BALAKIREV ◽  
J. B. BETTS ◽  
G. S. BOEBINGER ◽  
S. ONO ◽  
Y. ANDO ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Carrier Concentration ◽  
Hall Coefficient ◽  
Normal State ◽  
Ground State ◽  
Low Temperatures ◽  
Optimal Doping ◽  
Underdoped Sample ◽  
Additional Support

We report low-temperature Hall coefficient in the normal state of the high-Tc superconductor Bi 2 Sr 2-x La x CuO 6+δ. The Hall coefficient was measured down to 0.5 K by suppressing superconductivity with a 60 T pulsed magnetic field. The carrier concentration was varied from overdoped to underdoped regimes by partially substituting Sr with La in a set of five samples. The observed saturation of the Hall coefficient at low temperatures suggests the ability to extract the carrier concentration of each sample. The most underdoped sample exhibits a diverging Hall coefficient at low temperatures, consistent with a depletion of carriers in the insulating ground state. The Hall number exhibits a sharp peak providing additional support for the existence of a phase boundary at the optimal doping.

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