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

Journal Article · Thu Aug 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4893319· OSTI ID:22314302

Kumar, Vinod; Kumar, Rajesh ^[1]; Singh, Kiran ^[2]; Arora, S. K.; Shvets, I. V. ^[3]; Kumar, Ravi ^[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)

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.

• OSTI ID: 22314302
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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