Almost localized fermions in a magnetic field: Properties at the metamagnetic transition

1997 ◽  
Vol 56 (3) ◽  
pp. 971-974 ◽  
Author(s):  
Jozef Spałek ◽  
Paweł Korbel ◽  
Włodzimierz Wójcik
Keyword(s):  
Magnetic Field ◽  
Metamagnetic Transition ◽  
Localized Fermions

scholarly journals Large linear magnetoelectric effect and field-induced ferromagnetism and ferroelectricity in DyCrO4

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Xudong Shen ◽  
Long Zhou ◽  
Yisheng Chai ◽  
Yan Wu ◽  
Zhehong Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Spin Structure ◽  
Magnetoelectric Effect ◽  
Electric Polarization ◽  
Metamagnetic Transition ◽  
Ferromagnetic Component ◽  
Antiferromagnetic Structure ◽  
Field Control ◽  
Ferromagnetic Magnetization

Abstract All the magnetoelectric properties of scheelite-type DyCrO4 are characterized by temperature- and field-dependent magnetization, specific heat, permittivity, electric polarization, and neutron diffraction measurements. Upon application of a magnetic field within ±3 T, the nonpolar collinear antiferromagnetic structure leads to a large linear magnetoelectric effect with a considerable coupling coefficient. An applied electric field can induce the converse linear magnetoelectric effect, realizing magnetic field control of ferroelectricity and electric field control of magnetism. Furthermore, a higher magnetic field (>3 T) can cause a metamagnetic transition from the initially collinear antiferromagnetic structure to a canted structure, generating a large ferromagnetic magnetization up to 7.0 μB f.u.−1. Moreover, the new spin structure can break the space inversion symmetry, yielding ferroelectric polarization, which leads to coupling of ferromagnetism and ferroelectricity with a large ferromagnetic component.

Pronounced effects of high-magnetic-field solidification on metamagnetic transition in tetragonal Cu2Sb-type Mn1.8Cu0.2Sb alloy

2017 ◽  
Vol 442 ◽  
pp. 67-71 ◽  
Author(s):  
Xiaoqian Zhou ◽  
Hui Zhong ◽  
Dedong Yu ◽  
Zhenchao Wen ◽  
Weibin Cui ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Metamagnetic Transition

Electronic Properties of Magnetic Superconductor HoNi2B2C Under High Pressure

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3664-3671 ◽  
Author(s):  
G. Oomi ◽  
N. Matsuda ◽  
T. Kagayama ◽  
C. K. Cho ◽  
P. C. Canfield
Keyword(s):  
Magnetic Field ◽  
High Pressure ◽  
Electrical Resistivity ◽  
Fermi Liquid ◽  
High Pressures ◽  
Metamagnetic Transition ◽  
Liquid Behavior ◽  
The Stability ◽  
Normal Fermi ◽  
Fermi Liquid Behavior

The electrical resistivity of single crystalline HoNi 2 B 2 C has been measured at high pressure and magnetic fields. The three anomalies in the magnetoresistance due to metamagnetic transitions are observed both at ambient and high pressures. It is found that the metamagnetic transition fields increase with increasing pressure. The temperature dependence of electrical resistivity is strongly dependent on magnetic field. Non Fermi liquid behavior is observed near the metamagnetic transition fields. But the normal Fermi liquid behavior recovers after completing the phase transition. The Grüneisen parameters are also calculated to examine the stability of electronic state.

Self-organized Bi-rich grain boundary precipitates for realizing steep magnetic-field-driven metamagnetic transition in Bi-doped Mn2Sb

2020 ◽  
Vol 200 ◽  
pp. 835-847
Author(s):  
Zhishuo Zhang ◽  
Yuxi Zhang ◽  
Xiaohua Luo ◽  
Shengcan Ma ◽  
Hai Zeng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Metamagnetic Transition ◽  
Self Organized

scholarly journals Large magnetodielectric coupling in the vicinity of metamagnetic transition in 6H−perovskite Ba3GdRu2O9

2022 ◽  
Author(s):  
Sonu Chhillar ◽  
Kaustav Mukherjee ◽  
C. S. Yadav
Keyword(s):  
Magnetic Field ◽  
Heat Capacity ◽  
Magnetic Behavior ◽  
Magnetic Interactions ◽  
Metamagnetic Transition ◽  
Lower Temperature Side ◽  
Lower Temperature ◽  
Transition Complex ◽  
The Magnetic Field ◽  
Temperature Side

Abstract The 6H-perovskites Ba3RRu2O9 (R = rare earth element) demonstrate the magnetodielectric (MD) coupling as a manifestation of 4d - 4f magnetic interactions. Here, we have reported a detailed study of the structural, magnetic, heat capacity, and MD properties of the 6H-perovskite Ba3GdRu2O9. The signature of long-range antiferromagnetic (AFM) ordering at ~14.8 K (TN) is evident from the magnetization and heat capacity studies. The TN shifts towards the lower temperature side, apart from splitting in two with the application of the magnetic field. Field-dependent magnetization at 2 K shows three metamagnetic transitions with the opening of small hysteresis in different regions. A new transition at T1 emerges after the onset of the first metamagnetic transition. Complex magnetic behavior is observed in different magnetic field regions whereas these field regions themselves vary with the temperature. Dielectric response recorded at zero and 80 kOe field exhibits the development of MD coupling well above TN. The MD coupling (~ 4.5 % at 10 K) is enhanced by 25 % as compared to the Dy counterpart. Effect of complex magnetic behavior is also conveyed in the MD results where the maximum value of MD coupling is observed in the vicinity of 10 K (onset of T1) and near the second metamagnetic transition. Our investigation suggests that both Gd and Ru moments align simultaneously at TN. Short-range magnetic correlations are possibly responsible for MD coupling above TN.

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

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