Publication Date

11-30-2018

Department

Ames Laboratory; Physics and Astronomy

Campus Units

Ames Laboratory, Physics and Astronomy

OSTI ID+

1487220

Report Number

IS-J 9826

DOI

10.1103/PhysRevB.98.184433

Journal Title

Physical Review B

Volume Number

98

Issue Number

18

First Page

184433

Abstract

Co-59 and P-31 nuclear magnetic resonance (NMR) measurements in external magnetic and zero magnetic fields have been performed to investigate themagnetic properties of the A-type antiferromagnetic (AFM) CaCo2P2. NMR data, especially the nuclear spin lattice relaxation rates 1/T-1 exhibiting a clear peak, provide clear evidence for the AFM transition at a Ned temperature of T-N similar to 110 K. The magnetic fluctuations in the paramagnetic state were found to be three-dimensional ferromagnetic, suggesting ferromagnetic interaction between Co spins in the ab plane characterizes the spin correlations in the paramagnetic state. In the AFM state below T-N, we have observed Co-59 and P-31 NMR signals under zero magnetic field. From Co-59 NMR data, theordered magnetic moments of Co are found to be in ab plane and are estimated to be 0.35 mu(B) at 4.2 K. Furthermore, the external field dependence of Co-59 NMR spectrum in the AFM state suggests a very weak magnetic anisotropy of the Co ions and also provides microscopic evidence of canting the Co-ordered moments along the external magnetic field directions. The magnetic state of the Co ions in CaCo2P2 is well explained by the local-moment picture in the AFM state, although the system is metallic, as seen by 1/T1T = constant behavior.

DOE Contract Number(s)

AC02-07CH11358; JP15K21732; JP15H05885; JP16H01078

Language

en

Department of Energy Subject Categories

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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