Body-Centered-Cubic Ni and Its Magnetic Properties

Abstract

The body-centered-cubic (bcc) phase of Ni, which does not exist in nature, has been achieved as a thin film on GaAs(001) at 170 K via molecular beam epitaxy. The bcc Ni is ferromagnetic with a Curie temperature of 456 K and possesses a magnetic moment of 0.52+/-0.08 micro(B)/atom. The cubic magnetocrystalline anisotropy of bcc Ni is determined to be +4.0x10(5) ergs x cm(-3), as opposed to -5.7x10(4) ergs x cm(-3) for the naturally occurring face-centered-cubic (fcc) Ni. This sharp contrast in the magnetic anisotropy is attributed to the different electronic band structures between bcc Ni and fcc Ni, which are determined using angle-resolved photoemission with synchrotron radiation.

Magnetic phase diagram of the Fe–Ni system

“…In Table 3, the experimental magnetic transition temperatures and magnetic moment of pure Fe and Ni [14,19,[54][55][56][57][58][59] are compared with the evaluation by SGTE [33] and Swartzendruber et al [39]. It was found that the recommended value of T C and b for bcc Ni by SGTE [33] needs to be revised as a result of the experiments by Tian et al [19].…”

“…Therefore, the values of b are determined mainly from the Ni thin films, which grow on some special substrates [18,19]. For example, in the work of Tian et al [19], the magnetic moment of bcc Ni was determined from the Ni thin films by epitaxial growth on the GaAs single crystal substrate with {0 0 1} parallel to the surface. Although the experimental b in Fig.…”

Size Dependence of Structures and Properties of Magnetic Materials

“…Thermal stability of nanocrystals is also responsible for other thermally activated behaviors such as atomic diffusion [25,26] and crystal growth [27,28], which in turn influences the magnetic properties of nanocrystals because they depend not only on D, but on crystalline structures and presence of lattice defects [29][30][31].…”

Scanning tunneling spectroscopy of Ni/W(110): bcc and fcc properties in the second atomic layer

“…Furthermore bcc Ni was grown successfully on Fe(001) [20][21][22] and GaAs(001) 23 . In order to gain more insight Fig.…”