Magnetic disordered in Ti doped ErCo2 alloys: Griffiths-like behavior

Öner, Y.; Guillot, M.

doi:10.1016/j.jmmm.2012.05.044

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…The short-range order is a kind of low-temperature remnant of the magnetic order of the undiluted system, in the temperature range at which the system would order spontaneously if it were not diluted. This is the scenario in most of the physical realizations of Griffiths phases claimed up to now, as in germanates [19][20][21][22], manganites [23][24][25] and alloys [9,22,26,27]. The ac-susceptibility curve obtained for ErCo 2 shows the usual deviation from a Curie-Weiss behavior below a certain temperature which is, however, recovered under applied magnetic field [19,20,22,24].…”

Section: Introductionmentioning

confidence: 67%

Parimagnetism in HoCo₂and TmCo₂

Bonilla

Herrero‐Albillos

Figueroa

et al. 2014

J. Phys.: Condens. Matter

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X-ray magnetic circular dichroism (XMCD), longitudinal (χac) and transverse (TS) ac magnetic susceptibility have been measured in the RCo2 series (R = Ho, and Tm) as a function of temperature and applied magnetic field. We show that parimagnetism is a general behavior among the RCo2 ferrimagnetic series (R being a heavy rare-earth ion). XMCD results supply evidence of the presence of two compensation temperatures above Tc, defining two different parimagnetic configurations, which is a fully unexpected result. The inverse χ'ac curve exhibits a small anomaly which vanishes under low applied magnetic fields. The combination of TS and XMCD measurements allows one to depict new magnetic phase diagrams for these compounds of the RCo2 series. A new scenario allowing one to understand the observed phenomenology as a Griffiths phase-like behavior is proposed, where the amorphous RCo2 represents the undiluted system case.

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Section: Introductionmentioning

confidence: 67%

Parimagnetism in HoCo₂and TmCo₂

Bonilla

Herrero‐Albillos

Figueroa

et al. 2014

J. Phys.: Condens. Matter

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“…This is the scenario in most of the physical realizations of Griffiths phases claimed up to now, as in germanates [19][20][21][22] , manganites [23][24][25] and alloys. 9,22,26,27 The ac-susceptibility curve obtained for ErCo 2 shows the usual deviation from a Curie Weiss behavior below a certain temperature which is, however, recovered under applied magnetic field. 19,20,22,24 Such extreme sensitivity to the applied field is characteristic of a Griffiths phase.…”

Section: Introductionmentioning

confidence: 97%

Parimagnetism in RCo$_2$ series (R=Dy, Ho, and Tm)

Bonilla,

Herrero-Albillos,

Figueroa

et al. 2013

Preprint

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X-ray circular magnetic dichroism (XMCD), longitudinal (χac) and transverse (TS) ac magnetic susceptibility have been measured in several members of the RCo2 series (R = Dy, Ho, and Tm) as a function of temperature and applied magnetic field. We show that parimagnetism is a general behavior along the RCo2 ferrimagnetic series (R being a heavy rare earth ion). XMCD results evidence the presence of two compensation temperatures, defining two different parimagnetic configurations, which is a fully unexpected result. The inverse χac curve exhibits a deviation from Curie-Weiss behavior which is recovered under applied magnetic field. The large excess of polarizability above the critical temperature proves the existence of an enhanced effective moment due to the presence of short range magnetic correlations, which are also observed in TS measurements. The combination of TS and XMCD measurements allows to depict new magnetic phase diagrams for the RCo2 series. A new scenario allowing to understand the observed phenomenology as a Griffiths phase-like behavior is proposed, where the amorphous RCo2 represents the undiluted system case.

show abstract