chapter 2 Magnetoelasticity in Nanoscale Heterogeneous Magnetic Materials

Origin of Perpendicular Magnetic Anisotropy in Tb-Fe Amorphous Alloy

“…The present amorphous alloy exhibits a sperrimagnetic property. 9,10) Due to a strong uniaxial magnetic anisotropy of Tb, the magnetic moment is locked to the direction of the magnetic field in the higher temperature than the compensation temperature 350 K and the direction is kept below this temperature. Therefore, the magnetization below 350 K becomes negative.…”

“…7. The initial slope of the curves stands for Young's modulus E, and the value of Stycast # 2850 KT was about 10 substrate, together with their Young's modulus E are listed in Table 1. The values of H a obtained from eq.…”

“…11) In rare earth amorphous alloys, the easy axis of local atomic magnetization is random in direction due to a structural disorder, and it is called the random magnetic anisotropy. 9,10) Even the random magnetic anisotropy exists in the amorphous phase, it would possibly appear the unidirectional magnetic anisotropy associated with magnetoelastic effects when a compressive strain is introduced in the in-plane direction. It has been pointed out that magnetic properties of amorphous rare earth-transition metal (RE-TM) films are strongly affected by preparation conditions.…”

Itinerant electron metamagnetism and magnetocaloric effect in RCo2-based Laves phase compounds

“…In such cases, the presence of IEM and FOT are diagnosed with the help of Arrott's plots. It has been established that the materials with negative M 4 coefficient in the Landau free energy expression posses S-shaped Arrott's plots [38]. To emphasize on the above point, the Arrott's plots for DyCo 2 and TbCo 2 are shown in Figs.…”

A new criterion to distinguish the order of magnetic transitions by means of magnetic measurements

“…The structural, electronic, and magnetic properties of these families of compounds have been well studied. 2,3,6,[13][14][15][16] The intermetallic RCo 2 samples with R = Tb, Pr, and Dy were prepared by using an induction furnace under Ar atmosphere. The alloys were later annealed under Ar atmosphere at 850°C for 8-12 days depending on the sample.…”