Exceedingly Small Moment Itinerant Ferromagnetism of Single Crystalline La${}_5$Co${}_2$Ge${}_3$

Abstract

Single crystals of monoclinic La${}_5$Co${}_2$Ge${}_3$ were grown using a self-flux method and were characterized by room-temperature powder X-ray diffraction, anisotropic temperature and field dependent magnetization, temperature dependent resistivity, specific heat, and muon spin rotation. La${}_5$Co${}_2$Ge${}_3$ has a Curie temperature ($T_{\mathrm{C}}$) of 3.8~K and clear signatures of ferromagnetism in magnetization and $\mu SR$ data, as well as a clear loss of spin disorder scattering in resistivity data and a sharp specific heat anomaly. The magnetism associated with La${}_5$Co${}_2$Ge${}_3$ is itinerant, has a change in the entropy at $T_{\mathrm{C}}$ of $\simeq$0.05 R ln2 per mol-Co, and has a low-field saturated moment of $\sim 0.1{\mu }_{\mathrm{B}}$/Co, making it a rare, itinerant, small moment, low $T_{\mathrm{C}}$ compound.

References in corpus (10)

• Metallic Quantum Ferromagnets
• New Materials Physics
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• Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe${}_3$ under Pressure
• Understanding the $\mu$SR spectra of MnSi without magnetic polarons
• Novel Itinerant Antiferromagnet TiAu
• Quantum tricritical point in the temperature-pressure-magnetic field phase diagram of CeTiGe${}_3$
• High pressure magnetic state of MnP probed by means of muon-spin rotation
• Magnetic states of MnP: muon-spin rotation studies
• Collapse of Kondo state and ferromagnetic quantum phase transition in YbFe${}_2$Zn${}_{20}$

Cited by in corpus (6)

• Coexisting structural disorder and robust spin-polarization in half-metallic FeMnVAl
• Magnetic properties of equiatomic CrMnFeCoNi
• Avoided ferromagnetic quantum critical point in pressurized La${}_5$Co${}_2$Ge${}_3$
• Spatially modulated, orbital selective ferromagnetism in La${}_5$Co${}_2$Ge${}_3$
• Quantum critical point followed by Kondo-like behavior due to Cu substitution in itinerant, antiferromagnet ${\text{La}}_2{\text{(Cu}}_x{\text{Ni}}_{1-x}{)}_7$
• Effect of Ni substitution on the fragile magnetic system ${\text{La}}_5{\text{Co}}_2{\text{Ge}}_3$