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Title: Evidence for spin glass state of NdCo{sub 1−x}Ni{sub x}O{sub 3} (x = 0.3−0.5)

Low-temperature magnetic properties of single phase NdCo{sub 1−x}Ni{sub x}O{sub 3}(x = 0.3−0.5) have been studied using ac and dc magnetic susceptibility measurements. Nickel substituted samples have been found to exhibit a different magnetic state at low temperature as compared to pristine NdCoO{sub 3}. The temperature dependent dc magnetization M (T) revealed the presence of a sharp cusp occurring at characteristic temperatures T{sub P}, for x = 0.3, 0.4, 0.5. Below T{sub P}, clear effect of magnetic field can be seen in M (T) curves and T{sub P} decreases with increasing magnetic field as well as Ni substitution content. The isothermal magnetization measurements at low temperatures shows small unsaturated hysteresis loop at lowest temperature (10 K). The ac susceptibility results show a clear frequency dependent feature. These results are analyzed to distinguish superparamagnetic and spin glass behavior by using Néel-Arrhennius, Vogel-Fulcher law, and power law fitting. This analysis ruled out the superparamagnet like state and suggests the presence of significant inter-cluster interactions, giving rise to spin-glass like cooperative freezing.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4]
  1. Department of Physics, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005 (India)
  2. Tata Institute of Fundamental Research, HomiBhaba Road, Colaba Mumbai-400005 (India)
  3. CRANN, School of Physics, Trinity College Dublin, Dublin 2, Republic of Ireland (Ireland)
  4. Centre for Materials Science and Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005 (India)
Publication Date:
OSTI Identifier:
22314302
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; CUSPED GEOMETRIES; DIAGRAMS; FREEZING; FREQUENCY DEPENDENCE; HYSTERESIS; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; NICKEL; SPIN GLASS STATE; SUPERPARAMAGNETISM; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K