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Abstract
To explore the possibility of quantum phase transitions and even quantum criticality in LaCrSb based compounds, we performed measurements under pressure as well as a vanadium substitution study. The Curie temperature of LaCrSb
was found to be invariant under pressure. Although pressure was not able to suppress the ferromagnetism, chemical substitution was used as another parameter to tune the magnetism. We grew La(V
Cr
)Sb
(x = 0–1.0) single crystals and studied the series by measurements of temperature- and field-dependent magnetic susceptibility, magnetization, resistivity and specific heat. Ferromagnetism has been observed for
, and the system manifests a strong anisotropy in its ordered state. The Curie temperature decreases monotonically as the V concentration increases. For
, the system enters a new magnetic state at low temperatures, and no magnetic ordering above 1.8 K can be observed for
. The effective moment
/Cr varies only slightly as the V concentration increases, from 3.9
for
= 0 to 2.9
for
= 0.88. Features related to quantum criticality have not been observed in the La(V
Cr
)Sb
system.
Acknowledgments
We thank W.E. Straszheim for his assistance with the elemental analysis of the samples. We appreciate help of E. Colombier and A. Kaminski in setting up the ruby fluorescence system. We also would like to thank H. Hodovanets for assisting in Laue diffraction measurement.
Notes
This work was carried out at the Iowa State University and supported by the AFOSR-MURI [grant number FA9550-09-1-0603] (X. Lin, V. Taufour and P.C. Canfield). S.L. Bud’ko was supported by the US Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering. Part of this work was performed at Ames Laboratory, US DOE, under Contract No. DE-AC02-07CH11358.