Second and third harmonics of the spin density wave in chromium metal. [Neutron diffraction]

Journal Article · Thu Jan 01 00:00:00 EST 1976 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.13.295· OSTI ID:7364068

Pynn, R ^[1]; Press, W; Shapiro, S M; Werner, S A

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1. Brookhaven National Lab., Upton, NY

Neutron-diffraction measurements with a single crystal of chromium in an approximately single-Q state have revealed the existence of a satellite reflection at three times the wave vector (vector Q) of the spin density wave (SDW). This 3Q harmonic is itself an SDW with a polarization identical to that of the primary SDW and an amplitude vector M/sub 3Q/ which is (1.65 +- 0.05) x 10/sup -2/ times the amplitude vector M/sub 1Q/ of the primary SDW at 200/sup 0/K. The amplitude parallel vector M/sub 3Q/ parallel is found to be proportional to parallel vector M/sub 1Q/parallel/sup 3/ for temperatures close to the Neel point; for temperatures below about 220/sup 0/K there is a tendency for parallel vector M/sub 3Q/parallel to approach a staturated value. This behavior is contrasted with that of the recently discovered 2Q harmonic whose amplitude vector A/sub 2Q/ is found to be proportional to parallel vector M/sub 1Q/parallel/sup 2/ even at low temperatures. (auth)

• OSTI ID: 7364068
• Journal Information: Phys. Rev., B; (United States), Vol. 13:1
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHROMIUM
SPIN WAVES
LOW TEMPERATURE
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
METALS
SCATTERING
TRANSITION ELEMENTS
656000* - Condensed Matter Physics