Field tuned critical fluctuations in YFe2Al10: Evidence from magnetization, 27Al (NMR, NQR) investigations

Abstract

We report magnetization, specific heat, and NMR investigations on YFe2Al10 over a wide range in temperature and magnetic field and zero field (NQR) measurements. Magnetic susceptibility, specific heat and spin-lattice relaxation rate divided by T (1/T1T) follow a weak power law (T^-0.4) temperature dependence, which is a signature of critical fluctuations of Fe moments. The value of the Sommerfeld-Wilson ratio and linear relation between 1/T1T and chi(T) suggest the existence of ferromagnetic correlations in this system. No magnetic ordering down to 50 mK in Cp(T) and the unusual temperature and field scaling of the bulk and NMR data are associated with a magnetic instability which drives the system to quantum criticality. The magnetic properties of the system are tuned by field wherein ferromagnetic fluctuations are suppressed and a crossover from quantum critical to FL behavior is observed with increasing magnetic field.

References in corpus (7)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Heavy Fermions and Quantum Phase Transitions
• Iron pnictides as a new setting for quantum criticality
• Destruction of Kondo effect in cubic heavy fermion compound Ce3Pd20Si6
• Discovery of Griffiths phase in itinerant magnetic semiconductor Fe_{1-x}Co_xS_2
• Absence of conventional quantum phase transitions in itinerant systems with disorder

Cited by in corpus (10)

• Metallic Quantum Ferromagnets
• Another dimension: investigations of molecular magnetism using muon-spin relaxation
• muSR and inelastic neutron scattering investigations of the caged type Kondo semimetals: CeT2Al10 (T=Fe, Ru and Os)
• Towards ferromagnetic quantum criticality in FeGa3-xGex: 71Ga NQR as a zero field microscopic probe
• Contiguous 3d and 4f magnetism: towards strongly correlated 3d electrons in YbFe2Al10
• Anomalous quantum-critical spin dynamics in YFe2Al10
• Nearly ferromagnetic metal state in the collapsed tetragonal phase of YFe${}_2$(Ge,Si)${}_2$
• Evolution of magnetic fluctuations through the Fe-induced paramagnetic to ferromagnetic transition in Cr${}_2$B
• Single crystal growth and physical property characterizations of mixed valent compound YbFe${}_2$Al${}_{10}$
• 121,123Sb NQR as a microscopic probe in Te doped correlated semimetal FeSb2 : emergence of electronic Griffith phase, magnetism and metallic behavior %