Positive magnetoresistivity in a localized-moment ferromagnet with itinerant spin fluctuations:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TmCo</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Nakama, Takao; Shintani, K.; Yagasaki, Kazuyuki; Burkov, A. T.; Uwatoko, Yoshiya

doi:10.1103/physrevb.60.511

Cited by 18 publications

(13 citation statements)

References 19 publications

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“…In TmCo 2 a transition to feromagnetic (below 3.8 K) and ferromagnetic spiral structure (below 3.4 K) was observed [6]. This compound has been studied due to the interesting mechanisms governing magnetoresistivity [7].…”

Section: Introductionmentioning

confidence: 97%

Neutron diffraction on TmNi₄Al

Toliński

Szytuła

Hoser

et al. 2006

Physica Status Solidi (b)

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Tm and its alloys are known to create non-collinear magnetic phases, therefore this same can be expected in the case of TmNi 4 Al. Indeed, we have observed that this compound, contrary to the other RNi 4 Al members, exhibits an additional hump in the ac magnetic susceptibility at T C2 = 2.8 K apart from the main peak at T C1 = 5.8 K. It may imply a double phase transition or an impurity phase. The magnetization curves and the neutron diffraction have been measured above the higher temperature transition, between the two transitions and below the lower temperature peak of the ac susceptibility. However, magnetization curves as well as the neutron diffraction patterns do not provide any evidence of the antiferromagnetic ordering but suggest a ferromagnetic state. There is only an increase of the intensities observed between 4.2 K and 1.8 K. Therefore, the two peaks in the ac magnetic susceptibility can be ascribed to a switch between two various slightly non-collinear orderings of the magnetic moments and/or a small distortion of the crystallographic structure. The latter possibility results from the observed small broadening of the diffraction peaks.

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Section: Introductionmentioning

confidence: 97%

Neutron diffraction on TmNi₄Al

Toliński

Szytuła

Hoser

et al. 2006

Physica Status Solidi (b)

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“…Thus Fig. 3(b) shows the straight-line behaviour of T 2 dependent resistivity well below T C , which is attributed to the r spd [18,19]. A tendency for strong saturation in r(T), observed pertaining to the RCo 2 compounds.…”

Section: Discussionmentioning

confidence: 79%

“…r spd is independent of temperature above T C , but it shows a T 2 dependence below T C [18]. The phonon contribution to resistivity, r ph at low temperatures varies as r ph ¼ bT 5 [1,18]. The resistivity plots of (Dy 1Àx Mm x )Co 2 below T C could be fitted well to the expression r(T) ¼ r 0 þ AT 2 þ BT 5 [14].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore the total resistivity of (Dy 1Àx Mm x )Co 2 includes several contributions and can be obtained from the Matthiessen's rule given by r(T) ¼ r 0 þ r ph (T) þ r mag (T), where r 0 is the residual resistivity, r ph is the phonon contribution, r mag ( ¼ r sf (T) þ r spd (T)) is the magnetic contribution. r spd is independent of temperature above T C , but it shows a T 2 dependence below T C [18]. The phonon contribution to resistivity, r ph at low temperatures varies as r ph ¼ bT 5 [1,18].…”

Section: Discussionmentioning

confidence: 99%

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Magnetic and transport properties of Laves phase Dy1−xMmxCo2 (x=0–0.5) alloys

2009

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“…spd is independent of temperature above T C , but it shows a T 2 dependence below T C . 24 The phonon contribution to resistivity ph at low temperatures varies as ph = bT 5 . 14, 24 The resistivity plots of Ho 1−x Mm x Co 2 below T C could be fitted well to the expression ͑T͒ = 0 + AT 2 + BT 5 .…”

Section: Temperature Dependent Electrical Resistivity Of Ho 1−x MMmentioning

confidence: 99%

Influence of hydrogen absorption on structural and electrical transport properties of Ho1−xMmxCo2 alloys

Gadipelli

Sankaranarayanan

Ramaprabhu

2007

Journal of Applied Physics

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The structural and electrical transport properties of Ho1−xMmxCo2 (x=0, 0.1, 0.2, 0.3, and 0.4 and Mm=mischmetal) alloys and their hydrides in the hydrogen concentration (y) range of 0⩽y⩽3.6 have been determined through the powder x-ray diffraction (XRD) and temperature dependence of electrical resistivity [ρ(T)] measurements. At room temperature, these compounds crystallize in MgCu2-type (C15) structure. The crystalline nature and lattice expansion of hydrogenated alloys have been studied using the hydrogen concentration dependence of XRD peak analysis indicating the coexistence of two hydride phases at intermediate hydrogen concentrations. The temperature dependence of the electrical resistivity of alloys has been discussed based on the conduction electron scattering and spin fluctuation scattering mechanisms. The changes in magnetic ordering and transition temperature upon Mm substitution and at different concentrations of hydrogen loadings have been discussed. Furthermore, the transformation from metalliclike conductivity to thermally activated conduction mechanism and different conduction regimes of temperature dependent resistivity upon increasing H concentration have been well described by Kondo-type and electron-electron scattering effects.

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Positive magnetoresistivity in a localized-moment ferromagnet with itinerant spin fluctuations:TmCo2

Cited by 18 publications

References 19 publications

Neutron diffraction on TmNi₄Al

Neutron diffraction on TmNi₄Al

Magnetic and transport properties of Laves phase Dy1−xMmxCo2 (x=0–0.5) alloys

Influence of hydrogen absorption on structural and electrical transport properties of Ho1−xMmxCo2 alloys

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Positive magnetoresistivity in a localized-moment ferromagnet with itinerant spin fluctuations:TmCo2

Cited by 18 publications

References 19 publications

Neutron diffraction on TmNi4Al

Neutron diffraction on TmNi4Al

Magnetic and transport properties of Laves phase Dy1−xMmxCo2 (x=0–0.5) alloys

Influence of hydrogen absorption on structural and electrical transport properties of Ho1−xMmxCo2 alloys

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Product

Resources

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Neutron diffraction on TmNi₄Al

Neutron diffraction on TmNi₄Al