De Haas-van Alphen Effect and Fermi Surface Properties in Ferromagnet LaCo2P2 and Related Compounds

Magnetic properties of the itinerant A- type antiferromagnet CaCo2P2 studied by Co59 and Higa1, Ding2, Teruya3 et al. 2018Phys. Rev. B5000View full textAdd to dashboardCite

“…In order to investigate the magnetic fluctuations in CaCo 2 P 2 , we have measured the 31 P spin-lattice relaxation rate (1/T 1 ) at the peak position of the spectra for both the magnetic field directions. Figure 3 shows the temperature dependence of 1/T 1 where 1/T 1 increases with decreasing temperature from 300 K to T N and exhibits a clear peak corresponding to the AFM ordering at T N = 110 K. In the AFM state, 1/T 1 for both the magnetic field directions is proportional to T , consistent with the metallic state shown by electrical resistivity measurements 35 .…”

“…A single crystal of CaCo 2 P 2 was grown by Sn-flux method. Details of the sample preparation are described elsewhere 35 . NMR measurements were performed on 31 P (I = 1/2, γ n /2π = 17.235 MHz/T) and 59 Co (I = 7/2, γ n /2π = 10.03 MHz/T) by using a homemade phasecoherent spin-echo pulse spectrometer.…”

“…A metamagnetic transition from the Pauli paramagnetic to the ferromagnetic state at a high magnetic field of 60 T has been reported 30 . LaCo 2 P 2 with the tetragonal structure is known to be an itinerant ferromagnet with a Curie temperature of T C = 130 K and a saturated Co moment of 0.4 µ B [33][34][35] .…”

“…From the neutron diffraction (ND) measurements on powder samples of CaCo 2 P 2 , the ordered Co moments are estimated to be 0.32 µ B 36 . The magnetic susceptibility increases by lowering temperature and exhibits a small kink at T N 35,37 . Even below T N , the magnetic susceptibility keeps increasing and shows a broad maximum at T * ∼ 32-36 K whose origin is not well understood yet 35,37 .…”

“…The magnetic susceptibility increases by lowering temperature and exhibits a small kink at T N 35,37 . Even below T N , the magnetic susceptibility keeps increasing and shows a broad maximum at T * ∼ 32-36 K whose origin is not well understood yet 35,37 . Teruya et al suggested that the anomaly at T * is intrinsic and relates to the metamagnetic-like behavior observed in the magnetization data 35 .…”