New samarium and neodymium based admixed ferromagnets with near-zero net magnetization and tunable exchange bias field

Kulkarni, P. D.; Vaidya, Ulhas; Dhar, S. K.; Manfrinetti, P.; Grover, A. K.

doi:10.1088/0022-3727/42/8/082001

Cited by 12 publications

(19 citation statements)

References 20 publications

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“…Here, interesting temperature dependence of H E probes insight into the microscopic views of coexisting magnetic structures in the vicinity of compensation temperature of these alloys. Similar to that observed in those Laves phase compounds, rare earth based intermetallics, SmScGe and NdScGe also exhibited EB effect near-zero net magnetization with substitutions of 6-9 atomic % of Nd and 25 atomic % of Gd, respectively [147]. These magnetically ordered materials with 'no-net' magnetization and appreciable conduction electron polarization displayed signature of H E which could be tuned by the substitution.…”

Section: Laves Phase Intermetallic Compounds and Alloyssupporting

confidence: 77%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

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Abstract. The phenomenology of exchange bias effects observed in structurally single-phase alloys and compounds but composed of a variety of coexisting magnetic phases such as ferromagnetic, antiferromagnetic, ferrimagnetic, spin-glass, clusterglass, disordered magnetic states are reviewed. The investigations on exchange bias effects are discussed in diverse types of alloys and compounds where qualitative and quantitative aspects of magnetism are focused based on macroscopic experimental tools such as magnetization and magnetoresistance measurements. Here, we focus on improvement of fundamental issues of the exchange bias effects rather than on their technological importance.

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Section: Laves Phase Intermetallic Compounds and Alloyssupporting

confidence: 77%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

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“…The quadrupole splitting of 10 mm/s at 78 K and hyperfine field of 22.6 T at 4.2 K have been observed from this study. 151 Eu Mössbauer studies show that the isomer shift for isostrutural compounds EuPdIn, EuPtIn and EuAuIn is linearly correlated with the shortest Eu-Eu distance in the structure [126]. Similar to isomershift, the hyperfine field at Eu nuclei at 4.2 K can also be almost linearly correlated with shortest Eu-Eu distance [126].…”

Section: Mössbauer Studiesmentioning

confidence: 91%

“…These compounds show negative P, indicating complex magnetic ordering. EuPd(Pt)Si show no clear magnetic ordering from susceptibility data however 151 Eu…”

Section: Rpdx Compoundsmentioning

confidence: 97%

Review on magnetic and related properties of RTX compounds

Gupta

Суреш

2015

Journal of Alloys and Compounds

262

124

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RTX (R=rare earths, T= 3d/4d/5d, transition metals such as Sc, Ti, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, and X=p-block elements such as Al, Ga, In, Si, Ge, Sn, As, Sb, Bi) series is a huge family of intermetallics compounds. These compounds crystallize in different crystal structures depending on the constituents. Though these compounds have been known for a long time, they came to limelight recently in view of the large magnetocaloric effect (MCE) and magnetoresistance (MR) shown by many of them. Most of these compounds crystallize in hexagonal and tetragonal crystal structures. Some of them show crystal structure modification with annealing temperature; while a few of them show iso-structural transition in the paramagnetic regime. Their magnetic ordering temperatures vary from very low temperatures to temperatures well above room temperature (~510 K). Depending on the crystal structure, they show a variety of magnetic and electrical properties.These compounds have been characterized by means of a variety of techniques/measurements such as x-ray diffraction, neutron diffraction, magnetic properties, heat capacity, magnetocaloric properties, electrical resistivity, magnetoresistance, thermoelectric power, thermal expansion, Hall effect, optical properties, XPS, Mössbauer spectroscopy, ESR, μSR, NMR, NQR etc. Some amount of work on theoretical calculations on electronic structure, crystal field interaction and exchange interactions has also been reported. The interesting aspect of this series is that they show a variety of physical properties such as Kondo effect, heavy fermion behavior, spin glass state, intermediate valence, superconductivity, multiple magnetic transitions, metamagnetism, large MCE, large positive as well as negative MR, spin orbital compensation, magnetic polaronic behavior, pseudo gap effect etc.Except Mn, no other transition metal in these compounds possesses considerable magnetic moments.Because of this RMnX compounds in general have high ordering temperatures. Interstitial modification using hydrogen and nitrogen is found to alter their crystal structures and magnetic properties considerably. RTX compounds also show interesting pressure effects on their structural and magnetic properties. In summary, these compounds show variety of physical properties over a wide range of temperatures. This review is intended to cover all the important results obtained in this family, particularly in the last few years.

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“…Since then, this effect has been observed in a large number of systems such as magnetic nanoparticles, bilayer of AFM/FM and FM/spin glass thin films. Interestingly, this effect is also observed in some bulk materials like, manganites, cobaltates, intermetallic compounds [2,3], etc. Needless to add, exchange bias is of immense technological importance in storage and recording devices.…”

Section: Introductionmentioning

confidence: 76%