Magnetic‐Field‐ and Pressure‐Induced Quantum Phases in Complex Materials

Abstract

This Progress Report presents temperature-, magnetic-field-, and pressure-dependent Raman measurements of strongly correlated materials such as the charge-ordering manganese perovskites, the multiferroic material TbMnO(3), and the charge-density wave (CDW) materials 1T-TiSe(2) and Cu(x)TiSe(2). These studies illustrate the rich array of phases and properties that can be accessed with field and pressure tuning in these materials, and demonstrate the efficacy of using magnetic-field- and pressure-dependent scattering methods to elucidate the microscopic changes associated with highly tunable behavior in complex materials.

Determination of the magnetocaloric effect from thermophysical parameters and their relationships near magnetic phase transition in doped manganites

“…Doped manganites with a general formula RE 1-x AE x MnO 3 (RE = La, Pr, Nd; AE = Ca, Sr, Ba, etc.) represent strongly correlated electron systems in which electron, magnetic and lattice subsystems are interrelated [1][2][3][4][5]. This means that the parameters characterizing the state of one of the subsystems will correlate with those of the other two.…”

“…resistivity, magnetization, specific heat, magnetostriction, etc. ), which appear to occur strongly in the vicinity of the magnetic phase transition of the material [1,2,4]. An excellent example of this includes the colossal magnetoresistive (CMR) effect [6], the large magnetocaloric effect (MCE) [7], and the giant magnetostriction (GMS) effect [8], which even co-exist in a doped manganite system.…”