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Diop, L.V.B.; Isnard, O.; Rodrı́guez-Carvajal, J.

doi:10.1103/physrevb.93.014440

Cited by 37 publications

(49 citation statements)

References 43 publications

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“…The characteristic temperatures obtained from the magnetic and transport measurements are listed in Table II and are in very good agreement with the values found in the literature [7][8][9][10][11][12][13][14][15][16]. Figure 5 displays the magnetoresistance (MR) in the perpendicular (H ⊥ i) and parallel (H i) configurations at T = 2 K for YCo 12 B 6 .…”

Section: B Resistivitysupporting

confidence: 85%

“…These compounds exhibit magnetic order below room temperature, with Curie temperature ranging around 150 K. Several noticeable developments have recently been reported concerning this family of materials. A remarkable example is the discovery of the nonconventional and discontinuous magnetization process featured by dramatically sharp steps, as in LaFe 12 B 6 [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…This spin reorientation transition has been described as resulting from the competition between the magnetocrystalline anisotropies due to the Ho and Co sublattice, respectively [17]. Though the structural and magnetic properties of the intermetallic compounds RT 12 B 6 have been extensively studied over the past 50 years [7][8][9][10][11][12][13][14][15][16], only a few works address the electrical resistivity on these systems [4][5][6]. To our knowledge, no investigations have been reported on magnetotransport properties such as magnetoresistance and the Hall effect, although a study on low-frequency magnetoimpedance was recently published [6].…”

Section: Introductionmentioning

confidence: 99%

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Electrical magnetotransport properties in RCo12B6 compounds ( R=Y , Gd, and Ho)

et al. 2020

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Remarkable electronic transport and magnetotransport properties are found in the intermetallic compounds RCo 12 B 6 (R = Y, Ho, and Gd). Detailed resistivity, magnetoresistance, and Hall effect measurements are reported in the temperature range between 2 and 320 K under applied magnetic fields up to 9 T. Auxiliary magnetization results and structural data are also reported. The magnetic ordering observed in these systems depends on the rare-earth atom. In the YCo 12 B 6 compound, a ferromagnetic-type ordering is observed (T C ≈ 149 K) whereas the GdCo 12 B 6 and HoCo 12 B 6 compounds show ferrimagnetic-type ordering (T C ≈ 162 and 144 K, respectively) and their magnetization exhibits the compensation phenomenon. All compounds show high residual-resistance ratio (RRR) rates and resistivities typical of magnetically ordered systems, with a characteristic downward inflection at the critical temperature. The resistivity results are described in terms of the interplay between the electron-phonon interaction and a magnetic term. The magnetoresistance is consequence of a complex superposition of effects due to conduction in spin-polarized bands and to spin-disorder suppression. A strong positive contribution, which prevails at low temperatures, is described with a basis on the Campbell-Fert model that assumes conduction by two spin-polarized currents with a spin-mixing term. The usual negative effect related to suppression of spin disorder becomes the dominant contribution at intermediate-and high-temperature regimes. At low temperatures, the Hall resistivity results are also consistent with conduction by two spin-polarized bands. Moreover, a sign reversal observed in the Hall resistivity for all compounds at low temperatures indicates that the majority spin-up band is holelike, while the minority spin band is electronlike. The ordinary and anomalous Hall contributions could be separated. The intrinsic Karplus-Luttinger mechanism is the most relevant contribution to the anomalous Hall resistivity in all studied compounds. However, an additional term due to chiralities related to canting of the Co moments also plays a role in the temperature region near T C .

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Section: B Resistivitysupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrical magnetotransport properties in RCo12B6 compounds ( R=Y , Gd, and Ho)

et al. 2020

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“…Gaining prominence in the context of phase separated manganites, [33][34][35][36] this scenario has also been used to explain magnetization steps in other material classes, including a recent report in an itinerant electron system LaFe 12 B 6 . 37 The mechanism here pertains to the catastrophic evolution of the antiferromagnetic (AFM)ferromagnetic (FM) phase boundary when the applied magnetic field is used to change the predominantly AFM ground state to a FM one. The steps in magnetization are thus observed when the magnetization energy is minimized at the cost of the elastic energy at the AFM-FM interfaces.…”

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confidence: 99%

Reentrant superspin glass state and magnetization steps in the oxyborate Co2AlBO5

et al. 2017

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An oxyborate Co2AlBO5 belonging to the ludwigite family is investigated using structural, thermodynamic, dielectric and magnetic measurements. Magnetic measurements indicate that this system is seen to exhibit long range magnetic ordering at T N = 42 K, signatures of which are also seen in the specific heat, dielectric susceptibility, and the lattice parameters. The absence of a structural phase transition down to the lowest measured temperatures, distinguishes it from the more extensively investigated Fe-based ludwigites. At low temperatures, the system is seen to stabilize in a reentrant superspin glass phase at T G = 10.6 K from within the magnetically ordered state. This ground state is also characterized by magnetic field induced metamagnetic transitions, which at the lowest measured temperatures exhibit a number of sharp magnetization steps, reminiscent of that observed in the mixed valent manganites.

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“…LaFe12B6 presents many striking features and exotic magnetic behavior. Discontinuous and unconventional avalanche-like metamagnetic phase transitions were recently found in LaFe12B6 [5][6][7][8]. This peculiar and unusual multistep † leopold.diop@univ-lorraine.fr 2 magnetization process is characterized by extremely sharp jumps followed by plateaus.…”

Section: Introductionmentioning

confidence: 89%

Magnetic-field-induced avalanches in magnetization and magnetoresistance of La0.9Ce0.1Fe12B6 compound

Diop

Isnard

2021

Eur. Phys. J. Plus

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Competition between paramagnetic (PM), antiferromagnetic (AFM) and ferromagnetic (FM) phases in La0.9Ce0.1Fe12B6 itinerant-electron metamagnetic system is studied by a combination of magnetic, electrical resistivity and magnetoresistance measurements. La0.9Ce0.1Fe12B6 is an antiferromagnet below the Néel temperature (35 K) and presents two consecutive magnetic transitions AFM-FM and FM-PM during warming under certain applied magnetic field values.We further demonstrate that both AFM and PM phases may be converted into the FM phase irreversibly and reversibly via a first-order metamagnetic transition accompanied by a large magnetic field hysteresis. At very low temperatures, the magnetic-field driven AFM-FM metamagnetic transformation is discontinuous and proceeds by multiple abrupt steps in magnetization and magnetoresistance. In addition, an extraordinarily large negative magnetoresistance (MR) effect of -77% is observed. The consistency found in the magnetotransport and magnetization data suggests strong correlations between charge and spin degrees of freedom in La0.9Ce0.1Fe12B6 system.

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Ultrasharp magnetization steps in the antiferromagnetic itinerant-electron systemLaFe12B6

Cited by 37 publications

References 43 publications

Electrical magnetotransport properties in RCo12B6 compounds ( R=Y , Gd, and Ho)

Electrical magnetotransport properties in RCo12B6 compounds ( R=Y , Gd, and Ho)

Reentrant superspin glass state and magnetization steps in the oxyborate Co2AlBO5

Magnetic-field-induced avalanches in magnetization and magnetoresistance of La0.9Ce0.1Fe12B6 compound

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