Structural and Magnetic Properties of RBa2Cu2NbO8 (R = La, Pr, Nd)

1992 ◽  
Vol 275 ◽  
Author(s):  
H. B. Radousky ◽  
J. C. O'Brien ◽  
M. Bennahmias ◽  
P. Klavins ◽  
C. A. Smith ◽  
...  
Keyword(s):  
Thin Film ◽  
Phase Transition ◽  
Magnetic Properties ◽  
Buffer Layer ◽  
Magnetic Phase Transition ◽  
Single Phase ◽  
Tunnel Junctions ◽  
Magnetic Phase ◽  
Magnetic Ordering ◽  
Structural And Magnetic Properties

ABSTRACTPrBa2Cu2NbO8 (PrBCNO) is an insulating analog to the YB2CU3O7 (YBCO) system, which is interesting as a thin film buffer layer in YBCO/PrBCNO/YBCO tunnel junctions as well as a potential high Tc superconductor if proper doping could be achieved. PrBCNO has a similar structure to PrBCO, with NbO2 planes replacing the CuO chains. Single phase polycrystalline samples of RBCNO have been synthesized with R = La, Pr and Nd. Attempts to synthesize this structure with the smaller ions Y and Gd have been unsuccessful. The PrBCNO samples show a signature in the magnetization of a magnetic ordering at 12 K. No such magnetic phase transition is observed down to 2 K in the NdBCNO material.

Correlating the local magnetic properties of the magnetic phase transition inGd5Ge4using scanning Hall probe imaging

2006 ◽  
Vol 73 (14) ◽  
Author(s):  
J. D. Moore ◽  
G. K. Perkins ◽  
Y. Bugoslavsky ◽  
L. F. Cohen ◽  
M. K. Chattopadhyay ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Hall Probe

An unusual zig-zag 1D copper(ii) coordination polymer displaying magnetic phase transition

2017 ◽  
Vol 46 (44) ◽  
pp. 15178-15180 ◽  
Author(s):  
Jun Wang ◽  
Bao-Hong Li ◽  
Lu Lu ◽  
Jian-Qiang Liu ◽  
Hiroshi Sakiyama ◽  
...  
Keyword(s):  
Phase Transition ◽  
Coordination Polymer ◽  
Long Range ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Magnetic Ordering ◽  
Magnetic Behaviour ◽  
1D Chain

A new Cu(ii)-based 1D chain was prepared and its magnetic behaviour was investigated, which indicated a magnetic phase transition below 25 K as well as long-range magnetic ordering.

Magnetic phase transition and magnetic properties in rare-earth-based RAl3C3 layered carbides

2021 ◽  
Vol 540 ◽  
pp. 168445
Author(s):  
Shuli Sun ◽  
Rui Liu ◽  
Guiquan Yao ◽  
Zhaohui Chen ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Magnetic Phase Transition ◽  
Magnetic Phase

Magnetic Properties of Spinel Cobaltite A Co2O4 (A=Zn and Li)

2016 ◽  
Vol 257 ◽  
pp. 115-118
Author(s):  
Ryota Murai ◽  
Minoru Maeda ◽  
Kouichi Takase ◽  
Yoshiki Takano ◽  
Tadataka Watanabe
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Magnetic Phase Transition ◽  
Mixed Crystal ◽  
Magnetic Phase ◽  
The Other ◽  
Antiferromagnetic Transition ◽  
Weiss Temperature ◽  
Charge Degree ◽  
Charge Degree Of Freedom

We synthesized polycrystals of cobaltite spinels LiCo2O4, ZnCo2O4, and their mixed crystal (Li1-xZnx)Co2O4, and performed the magnetic susceptibility and specific heat measurements. LiCo2O4 with the Weiss temperature ΘW ~ -114 K exhibits an antiferromagnetic transition at TN ~ 30 K. On the other hand, ZnCo2O4 with the Weiss temperature ΘW ~ -90 K exhibits the absence of magnetic phase transition down to low temperature (2 K), indicating the presence of strong frustration. Taking into account the absence of magnetic phase transition in the orbital-degenerate ZnCo2O4, it is suggested that the antiferromagnetic transition in the charge-orbital-degenerate LiCo2O4 is driven by the charge degree of freedom. Furthermore, the magnetic properties of (Li1-xZnx)Co2O4 suggest that the antiferromagnetic transition in LiCo2O4 is sensitively suppressed by diluting the charge degeneracy.

Observation of the correlation between the phonon frequency and long-range magnetic ordering on a MnW octacyanide molecule–based magnet

2021 ◽  
Author(s):  
Hiroko Tokoro ◽  
Naotaka Maeda ◽  
Kenta Imoto ◽  
Koji Nakabayashi ◽  
Kouji Chiba ◽  
...  
Keyword(s):  
Phase Transition ◽  
Frequency Shift ◽  
Long Range ◽  
Magnetic Phase Transition ◽  
Phonon Frequency ◽  
Magnetic Phase ◽  
Magnetic Ordering ◽  
Anomalous Change

We show an anomalous change in the phonon frequency at the magnetic phase transition on a cyanide-bridged bimetal assembly, Mn3[W(CN)8]2(pyrimidine)4·6H2O. This compound shows a frequency shift in the CN stretching...

PHASE TRANSITIONS IN INSULATING VANADIUM OXIDE

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3338-3338 ◽  
Author(s):  
A. JOSHI ◽  
M. MA ◽  
F. C. ZHANG
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Magnetic Transition ◽  
Magnetic Ordering ◽  
Orbital Ordering ◽  
First Order ◽  
Bond Model ◽  
Orbital Phase

The magnetic phase transition from the paramagnetic to antiferromagnetic state in insulating V2O3 shows some very interesting features. Not only is the magnetic order ng pattern anomalous, but the magnetic transition shows other surprises: I) the magnetic and orbital ordering occur at the same transition temperature; II) the transition is strongly first order; III) above the transition temperature, neutron scattering observes features in wave vectors different from the ordering wave vector. We study this system using the recently proposed S = 2 bond model (Phys. Rev. Lett.85, 1714 (2000)) for insulating V2O3. We show that this model not only explains the anomalous magnetic ordering, but also resolves the other questions associated with the magnetic phase transition (Phys. Rev. Lett.86, 5743 (2001)). We further point out the possibility of changes in the phase transition phenomenology in presence of a magnetic field, and another orbital phase transition at lower temperatures.

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