scholarly journals Non-Heisenberg spin dynamics of double-exchange ferromagnets with Coulomb repulsion

2007 ◽  
Vol 75 (14) ◽  
Author(s):  
M. D. Kapetanakis ◽  
I. E. Perakis
Keyword(s):  
Spin Dynamics ◽  
Double Exchange ◽  
Coulomb Repulsion ◽  
Heisenberg Spin

scholarly journals Spin dynamics and disorder effects in theS=12kagome Heisenberg spin-liquid phase of kapellasite

2014 ◽  
Vol 90 (20) ◽  
Author(s):  
E. Kermarrec ◽  
A. Zorko ◽  
F. Bert ◽  
R. H. Colman ◽  
B. Koteswararao ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Spin Dynamics ◽  
Spin Liquid ◽  
Heisenberg Spin ◽  
Disorder Effects

Disorder and double-exchange spin dynamics inLa0.7Sr0.3MnO3andLa0.7Sr0.3CoO3from NMR hyperfine couplings

2007 ◽  
Vol 75 (10) ◽  
Author(s):  
M. J. R. Hoch ◽  
P. L. Kuhns ◽  
W. G. Moulton ◽  
A. P. Reyes ◽  
M. A. Torija ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Double Exchange ◽  
Hyperfine Couplings

scholarly journals Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba$$_{2}$$MnTeO$$_{6}$$

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. Khatua ◽  
T. Arh ◽  
Shashi B. Mishra ◽  
H. Luetkens ◽  
A. Zorko ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Degrees Of Freedom ◽  
Spin Dynamics ◽  
Muon Spin ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Double Perovskite ◽  
Magnetic Interactions ◽  
Spin Frustration ◽  
Ordered State

AbstractFrustrated magnets based on oxide double perovskites offer a viable ground wherein competing magnetic interactions, macroscopic ground state degeneracy and complex interplay between emergent degrees of freedom can lead to correlated quantum phenomena with exotic excitations highly relevant for potential technological applications. By local-probe muon spin relaxation ($$\mu$$ μ SR) and complementary thermodynamic measurements accompanied by first-principles calculations, we here demonstrate novel electronic structure and magnetic phases of Ba$$_{2}$$ 2 MnTeO$$_{6}$$ 6 , where Mn$$^{2+}$$ 2 + ions with S = 5/2 spins constitute a perfect triangular lattice. Magnetization results evidence the presence of strong antiferromagnetic interactions between Mn$$^{2+}$$ 2 + spins and a phase transition at $$T_{N}$$ T N = 20 K. Below $$T_{N}$$ T N , the specific heat data show antiferromagnetic magnon excitations with a gap of 1.4 K, which is due to magnetic anisotropy. $$\mu$$ μ SR reveals the presence of static internal fields in the ordered state and short-range spin correlations high above $$T_{N}$$ T N . It further unveils critical slowing-down of spin dynamics at $$T_{N}$$ T N and the persistence of spin dynamics even in the magnetically ordered state. Theoretical studies infer that Heisenberg interactions govern the inter- and intra-layer spin-frustration in this compound. Our results establish that the combined effect of a weak third-nearest-neighbour ferromagnetic inter-layer interaction (owing to double-exchange) and intra-layer interactions stabilizes a three-dimensional magnetic ordering in this frustrated magnet.

The spin dynamics of (VO)2P2O7: A Heisenberg spin ladder

1997 ◽  
Vol 234-236 ◽  
pp. 544-545 ◽  
Author(s):  
R.S. Eccleston ◽  
M.J. Steiner
Keyword(s):  
Spin Dynamics ◽  
Spin Ladder ◽  
Heisenberg Spin

scholarly journals Double-exchange magnets: Spin dynamics in the paramagnetic phase

1999 ◽  
Vol 59 (22) ◽  
pp. R14149-R14152 ◽  
Author(s):  
Peter Horsch ◽  
Janez Jaklič ◽  
Frank Mack
Keyword(s):  
Spin Dynamics ◽  
Double Exchange ◽  
Paramagnetic Phase
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