Static and dynamic magnetic response of CeFe2

Abstract

The magnetic response of CeFe2 single crystals was studied by direct-current magnetization and linear and nonlinear alternating-current susceptibility measurements. Several anomalies have been observed below the Curie temperature (TC=228 K). A kink near 30 K in the real component of the linear susceptibility, χ1′(T), is accompanied by a frequency dependent peak in both the linear imaginary part, χ1″(T), and the third-harmonic nonlinear susceptibility, |(3/4)χ3H02|. It is suggested that these features are related to the development of antiferromagnetic spin fluctuations of growing spatial extension, indicating an electronic instability below 80 K.

First-order transition from ferromagnetism to antiferromagnetism inCe(Fe0.96Al

“…Various experimental tools have been employed to ascertain the true magnetic state of a Ce sublattice and the instabilities related to an Fe sublattice. Studies based on neutron scattering, [12][13][14] magnetic circular x-ray dichroism, [15][16][17] magneto-optic Kerr effect, 18 high-energy spectroscopy ͑in-cluding x-ray photoemission, absorption, ultraviolet͒, 19,20 magnetic Compton scattering, 21 specific heat, 22 magnetization, 8 -11,23,24 magnetotransport, [25][26][27][28] ac susceptibility, [29][30][31][32] etc. were reported in pure and doped CeFe 2 alloys.…”

First-order metamagnetic transition in CeFe2-based pseudobinary alloys

“…The interesting magnetic properties of the C15-Laves phase compound CeFe 2 [1][2][3][4][5][6] and its pseudobinaries [7][8][9][10][11][12][13][14][15][16][17][18][19][20] have been attracting attention almost continuously for the last twenty years. Most of the studies are mainly focused on the proper understanding of the magnetic ground states of the parent as well as the pseudobinary compounds, and less emphasis is given to the exact nature of the phase transitions.…”

Temperature-dependent magnetic Compton scattering study of spin moments inCe(Fe0.94Ru0.06)2

“…1 Consequently, CeFe 2 and its pseudobinaries have been attracting attention continuously almost for the last three decades. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] This interest has been renewed by reports on the fragile nature of ferromagnetism at low temperature and the observation that the magnetic behavior of the Ce͑Fe 1−x M x ͒ 2 compounds ͑where M is usually a 3d ,4d, or 5d transition metal dopant͒ is strongly dependent on the nature and quantity of the impurity added. A couple of years ago, we had undertaken a magnetic Compton study on Ce͑Fe 0.96 Ru 0.04 ͒ 2 in which the characteristic double magnetic transition was clearly observed.…”