2007/01/31 by R. Mathieu, J. P. He, X. Z. Yu +8 · 12 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Charge (physics) #Condensed matter physics #Doping #Electronic and Structural Properties of Oxides #Impurity #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetometer #Materials science #Phase (matter) #Physics #Spin (aerodynamics) #Spin glass #cond-mat.mtrl-sci
paper · pdf · doi:10.1209/0295-5075/80/37001
published in Europhysics Letters (EPL) 80(3), 37001 (Institute of Physics) · EPL style; 6 pages, 5 figures
arxiv created 2007/09/10 · openalex publication_date 2007/09/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The relationship between orbital and spin degrees of freedom in the single crystals of the hole-doped Pr 1- x Ca 1+ x MnO 4 , 0.3 ⩽ x ⩽ 0.7 has been investigated by means of ac-magnetometry and charge transport. We show that in an intermediate underdoped region, with 0.35 ⩽ x < 0.5, the "orbital-master spin-slave" relationship commonly observed in half-doped manganites does not take place. The long-ranged charge-orbital order is not accompanied by an antiferromagnetic transition at low temperatures, but by a frustrated short-ranged magnetic state bringing forth a spin-glass phase. We discuss in detail the nature and origin of this true spin-glass state, which, as in the half-doped manganites with large quenched disorder, is not related to the macroscopic phase separation observed in crystals with minor defects or impurities.