The Nematic Character of a Hidden Ordered State revealed by Magnetic Fields.

2014 ◽  
Vol 1683 ◽  
Author(s):  
Peter S. Riseborough ◽  
S. G. Magalhaes ◽  
E.J. Calegari
Keyword(s):  
Magnetic Field ◽  
Critical Temperature ◽  
Low Temperature ◽  
Applied Field ◽  
Temperature Phase ◽  
Spin Quantization ◽  
Experimental Findings ◽  
Low Temperature Phase ◽  
The Magnetic Field ◽  
Ordered State

ABSTRACTWe examine a novel phase of the underscreened Anderson lattice Model that might pertain to the ”Hidden Ordered” phase of URu2Si2. We show that the system breaks spin-rotational invariance below the critical temperature and spontaneously selects a preferred axis of spin quantization. As a result, the low temperature phase exhibits a magnetic anisotropy, where the electronic properties depend not only on the magnitude of the magnetic field but also on the orientation of the applied field relative to the axis of quantization. The results are discussed in the context of recent experimental findings on URu2Si2.

scholarly journals RKKY interactions and magnetic structure of rare-earth quasicrystals

2014 ◽  
Vol 70 (a1) ◽  
pp. C84-C84
Author(s):  
Stefanie Thiem
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Magnetic Moments ◽  
Temperature Phase ◽  
Strongly Coupled ◽  
Cluster Spin Glass ◽  
Experimental Findings ◽  
Low Temperature Phase ◽  
Quasiperiodic Tilings ◽  
Good Agreement

We study the structure of the RKKY interactions and the corresponding low-temperature behaviour of magnetic moments for quasiperiodic tilings. The alignment of magnetic moments in rare-earth quasicrystals remains a fundamental open problem despite the continuous effort since the discovery of this material class. We compute the RKKY interactions between the localized magnetic moments by means of a continued fraction expansion of the Green's function of the conduction electrons. Thus, our approach takes the structure of the critical electronic wave functions into account. The results show the emergence of strongly coupled spin clusters while the inter-cluster coupling is significantly weaker. Monte Carlo simulations reveal with decreasing temperature first the freezing of spins within the clusters followed by the freezing of the clusters. Thus, the low-temperature phase behaves has similarities to a cluster spin glass which is in good agreement with previous experimental findings.

Low-temperature phase transition in EuMn2O5 induced by a strong magnetic field

2000 ◽  
Vol 284-288 ◽  
pp. 1402-1403 ◽  
Author(s):  
Y.F Popov ◽  
A.M Kadomtseva ◽  
G.P Vorob'ev ◽  
V.A Sanina ◽  
A.K Zvezdin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Low Temperature ◽  
Strong Magnetic Field ◽  
Temperature Phase ◽  
Temperature Phase Transition ◽  
Low Temperature Phase
Sign in / Sign up

Export Citation Format

Share Document