Magnetic properties of monocrystalline YCo4B

Thang, C.V.; Brommer, P.E.; Thuy, N.P.; Franse, J.J.M.

doi:10.1016/s0304-8853(97)00080-2

Cited by 13 publications

(22 citation statements)

References 31 publications

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“…This FOMP like behavior of YCo 4 B has been extensively studied elsewhere. 22,24,33 The present investigation reveals that Y 0. Here we take magnetic field where the maximum value of the field derivative of the magnetization curves is reached as the critical field of the FOMP, see Fig.…”

Section: B the First Order Like Magnetization Processsupporting

confidence: 49%

“…Due to a competition between two inequivalent Co atomic positions, the spin reorientation transition and the first order magnetization process ͑FOMP͒ have been found in YCo 4 B compound. Such behavior has been studied in details by magnetic measurements, 9,[24][25][26] neutron diffraction investigation, 3,9 Mossbauer spectroscopy, [27][28][29] NMR, 30 or band structure calculations. 31 More recently ThCo 4 B isotype compound has been discovered.…”

Section: Introductionmentioning

confidence: 99%

“…32 In order to understand deeper the Co sublattice magnetic properties, we present here results of a study of both the chemical and the hydrostatic pressure effects on magnetic properties of the Y 1−x Th x Co 4 B compound series. The magnetic properties of YCo 4 B have been investigated in details by Thang and co-workers 24,33 as well as the pressure dependence of these magnetic properties. 22,25,26 Pressure studies were performed on polycrystalline samples under hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

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On the pressure and temperature dependence of ordering temperature and magnetization of Y1−xThxCo4B compounds

Mayot

Isnard

Arnold

et al. 2010

Journal of Applied Physics

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We present here a detailed investigation of the pressure dependence of the structural and magnetic properties in a wide temperature range from 5 to 340 K for the Y 1−x Th x Co 4 B series. The unit cell lattice compressibility has been determined from powder neutron diffraction technique in the 0 to 0.5 GPa pressure range. Substitution of Th for Y is found to reduce significantly the compressibility. The Curie temperature decreases dramatically upon the Th for Y substitution. Studies were performed on polycrystalline samples under hydrostatic pressure up to 1.1 GPa and in magnetic field up to 5 T. The evolution of the saturation magnetization under pressure is presented as well as the pressure dependence of the Curie temperature. Remarkable pressure effects on the Curie temperature and on the critical field at which the first order magnetization process occurs for Y 0.8 Th 0.2 Co 4 B are analyzed and discussed. The pressure derivatives values of both the Curie temperature and the magnetization are negative for all the studied compounds. This is an opposite tendency than that expected from chemical pressure effects. This supports the dominant role of valence electrons in the magnetic properties of the substituted Y 1−x Th x Co 4 B compound in the case of the chemical pressure effect. The magnetization and the Curie temperature exhibit different pressure dependence along the Y 1−x Th x Co 4 B series of compounds.

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Section: B the First Order Like Magnetization Processsupporting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the pressure and temperature dependence of ordering temperature and magnetization of Y1−xThxCo4B compounds

Mayot

Isnard

Arnold

et al. 2010

Journal of Applied Physics

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“…For the non-magnetic elements, the magnetic properties are determined by the Co sublattice only and should in principle be the same, nevertheless significant differences have been shown to occurs. Indeed, the YCo 4 B phase undergoes a spin reorientation transition but the LaCo 4 B does not exhibit the same behaviour [16,[35][36][37][38]. This structure type has also been found to be retained with uranium leading to a nonmagnetic UCo 4 B compound [39].…”

Section: Discussion Of the Magnetic Properties Of The Rco 4 B Phases mentioning

confidence: 99%

Relation between crystal structure and physical properties of Rn+1M5+3nB2n phases

Isnard

Carillo

2007

Journal of Alloys and Compounds

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“…Further, the 300 K iron magnetic moments are about 2.0 and 1.2 μ B for the 2c and 6i sites and are oriented within the basal plane [9,11], an orientation which is in agreement with the 295 K x-ray diffraction patterns obtained on oriented powders. Although YCo 4 B exhibits a spin reorientation from basal [9,11,12], below 100 K, to axial, above 150 K, a spin reorientation which results from the competition between the different magnetic anisotropies of the two cobalt sites, the YCo 4−x Fe x B compounds, with x = 1, 2 and 3, do not exhibit [8,11] any spin reorientation between 4.2 and 295 K.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Numerical Simulation of Phase-Change Memory Cell with Probe like Bottom Electrode Structure

Liu

Zhang

Ling

et al. 2009

jjap

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The Mössbauer spectra of the YCo 4−x Fe x B compounds, where x is 1, 2 and 3, have been measured at 78 and 295 K and reveal relatively small iron hyperfine fields of about 15 T, relatively large quadrupole interactions of about +1.0 and −1.0 mm s −1 and very different spectra for YCo 3 FeB and YCo 2 Fe 2 B as compared with YCoFe 3 B. As a consequence, the spectra have been fitted with a full Hamiltonian by adjusting the hyperfine parameters of the iron 2c and 6i sites found in these compounds. The fits have used an asymmetry parameter, η, and Euler angles, θ and φ, that relate the hyperfine field to the iron electric field gradient axes of each iron site in an orientation that is consistent with the structural and magnetic properties of the site. The fits indicate that the relative areas of the spectral components assigned to the two iron 2c and 6i sites are in agreement with the iron occupancy of the sites as determined by neutron diffraction. The results of the fits also indicate both that the full Hamiltonian approach is required for physically reasonable spectral fits and that the small observed fields result from the presence of large orbital contributions which subtract from the Fermi contact contributions to the magnetic hyperfine fields of the two sites.

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Magnetic properties of monocrystalline YCo4B

Cited by 13 publications

References 31 publications

On the pressure and temperature dependence of ordering temperature and magnetization of Y1−xThxCo4B compounds

On the pressure and temperature dependence of ordering temperature and magnetization of Y1−xThxCo4B compounds

Relation between crystal structure and physical properties of Rn+1M5+3nB2n phases

Three-Dimensional Numerical Simulation of Phase-Change Memory Cell with Probe like Bottom Electrode Structure

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